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Beijing Sincerity Automatic Equipment Co., Ltd.

20 yrs
·Manufacturer/Factory & Trading Company
Main Products:
Coriolis Mass Flow Meter, Density Meter, Thermal Mass Flow Meter
Country/Region:
Beijing, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Beijing Sincerity Automatic Equipment Co. Ltd, excellence in Coriolis production, from 2006. Sincerity is the pioneering factory that create the very first unit of Chinese mass flow meter in 1991. Sincerity DMF series coriolis mass flow meter, is the new standard high performance solution for process industries. Its rugged construction, high accuracy and range of options, makes it perfect for use in the chemical, petrochemical, oil and gas, energy, and the food and beverage sectors.

Anhui Huazhong Industrial Control Intelligent Equipment Co., Ltd.

4.0
Main Products:
Flowmeter, Pressure Sensor, Level Sensor, Temperature Sensor, Signal Isolator, Isolated Safety Barrier, Current Sensor, Voltage Sensor
Country/Region:
Anhui, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Huazhong Industrial Control Intelligent Equipment Co., Ltd. is a high-tech enterprise specializing in the field of process automation. The company is equipped with an industry-leading flowmeter calibration system, a 16000 square meter intelligent production base, a 2500 square meter research and development laboratory, and 4 world-class SMT surface mount lines. The annual production capacity can reach 400000 sets of transmitters, 200000 sets of flow meters, 100000 sets of level measurement equipment, and 500000 sets of isolation module instruments. We have a professional team of over 300 people, providing process automation solutions for over 200000 enterprises in industries such as water and sewage, energy and power, chemical, life sciences, food and beverage, etc. We also offer digital services to small and medium-sized enterprises through our instrument cloud platform.

Kaifeng Chuangxin Measurement&Control Instrument Co., Ltd.

17 yrs
·Manufacturer/Factory & Trading Company
Main Products:
Measurement&Control Instrument
Country/Region:
Henan, China
R&D Capacity:
OEM/ODM Service
Company Profile:
Kaifeng ChuangXin Measurement and Control Instrument Co., Ltd. Was established in 2009, and is a professional company occupied in instruments R & D, manufacturer, sales and technical counsel. The main products are Electromagnetic Flowmeter, Vortex Flowmeter, Turbine Flowmeter, Orifice Flowmeter, Metal float flowmeter, Ultrasonic flowmeter, Swirlmeter and some other process control instruments. Our products are widely used in water treatment, environmental protection, water conservancy, petroleum, chemical, pharmaceutical, natural gas, electricity, heating supplying, papermaking, metallurgy, scientific research, military project and other fields.

Fujian Autec Factory Automation Equipment Co., Ltd.

19 yrs
·Manufacturer/Factory & Trading Company
Main Products:
ATV Acoustic Tomographic Section Flowmeter, ATD Jet Difference Cross Section Flow Meter, ADV Ultrasonic Doppler Flow Rate Flow Meter, AOADV Ultrasonic Doppler Telemetry Flow Rate Flow Meter, AOSL33 (B
Country/Region:
Fujian, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Founded in 2007, Fujian Aotai Automation Equipment Co., Ltd. is located in the beautiful city of Fuzhou, Fujian Province. It is an enterprise dedicated to providing measurement and control instruments and equipment for "Intelligent Manufacturing", "Smart Water Affairs" and "Smart City". The company aims to become an enterprise with advanced technology, professional services and strong competitiveness within the industry. Since its establishment, it has adhered to the concept of "creating a century-old store and establishing a national brand", focusing on the research and development, production, sales and service of instruments and meters, and striving to create value for customers. In the first ten years of its entrepreneurship, the company mainly focused on industrial process control instruments. It has successively developed multiple series of products, including panel-mounted instruments, pressure instruments, flow instruments, rail-mounted instruments, level instruments, and analytical instruments. These products are widely used in industries such as metallurgy, chemical engineering, light industry, pharmaceuticals, environmental protection, and petroleum. In recent years, with the popularization and development of modern communication technology applications, as well as the increased management requirements in municipal administration, water conservancy, and agriculture, Internet of Things (IoT) instruments have begun to be promoted in these fields. The company has seized the opportunity to develop a series of IoT perception layer products for these fields, such as acoustic tomography river cross-section flow meters, road waterlogging meters, Doppler flow meters, radar surface flow velocity meters, paddy field water level meters, and underground combined water level meters. At the same time, these products have been rapidly promoted and applied in multiple provinces and cities, and have received favorable comments from users. The company's competitiveness lies in combining its many years of mature experience in industrial instrument design with modern communication technology, making the newly developed products have the characteristics of convenient debugging, low power consumption, strong stability, and high precision. Currently, the company has set up more than a dozen offices across the country, which is convenient for providing services to a large number of users nearby. The company always adheres to the core values of "customer-centric, based on strivers, striving for perfection, innovation-driven, and keeping up with the times". We will continue to forge ahead in the fields of IoT instruments and traditional industrial instruments, contributing the wisdom of Aotai.

Zhejiang Sealand Technology Co., Ltd.

17 yrs
·Manufacturer/Factory
Main Products:
Mass Flow Meter.
Country/Region:
Zhejiang, China
R&D Capacity:
OEM Service
Sample Service:
Sample Available
Company Profile:
Zhejiang Sealand Technology Co. Ltd. Is a professional hi-tech enterprise, founded in 2009 with 45 million CNY registered capital. Located in Binhai ETDZ, Wenzhou, the factory covers an area of 4000m2, equipped with advanced production and test facilities.

Hefei WNK Smart Technology Co., Ltd.

13 yrs·5.0
·Manufacturer/Factory & Trading Company
Main Products:
Pressure Sensor, Pressure Transmitter, Pressure Switch, Water Level Sensor, Differential Pressure Transmitter
Country/Region:
Anhui, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Founded in 2004, Hefei WNK Smart Technology Co., Ltd is a hi-tech company specializing in different kinds of technologically-advanced and good quality sensor, transmitter and automation instrument. We devote to developing, manufacturing and selling of automation control system, providing our customers comprehensive fieldbus technical solutions and factory informatization construction.

Suzhou Qiantong Instrument Equipment Co., Ltd.

12 yrs
·Manufacturer/Factory & Trading Company
Main Products:
Universal Material Testing Machine, Zod Impact, Melt Flow Rate Tester
Country/Region:
Jiangsu, China
R&D Capacity:
OEM/ODM Service
Company Profile:
Suzhou Qiantong Instrument Equipment Co., Ltd is a well-known company specializing in the manufacturing and sale of high-end testing machines and laboratory equipment.

Holykell Technology Company Limited

16 yrs·5.0
·Manufacturer/Factory & Trading Company
Main Products:
Level Sensor, Flow Meter, Pressure Sensor, Wireless sensors, Temperature sensors
Country/Region:
Hunan, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Founded in 2001, Holykell is a High-Tech Enterprise integrating R&D, production and sales. The company have gathered a number of excellent domestic technical experts in various fields such as automation, electronics, machinery and computer. More than 80% of HOLYKELL employees have bachelor's degree. At present, HOLYKELL has more than 120, 000 customers worldwide and it's products are exported to 109 countries in Europe, America, Australia, Africa, SouthEast and Asia. In the latest petrochemical industry, our newest products have the advantages

Shenzhen StarWSN Science & Technology Co., Ltd.

10 yrs
·Manufacturer/Factory & Trading Company
Main Products:
Radar Water Level Monitoring, Wireless Water Flow Monitoring Instrument, Water Level Sensor, Water Level Transmitter, Water Quality Sensor, Water Flowmeter, Water Flow Meter, Water Level Gauge, Manhole Water Level Monitoring Solution, Manhole Water Level Monitoring System
Country/Region:
Guangdong, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
ShenZhen StarWSN is a professional liquid level and water quality monitoring instrument company which established in 2016. The company have gathered a number of excellent domestic technical experts in various fields such as automation, electronics, machinery and computer. We focusing on the application of smart sensing technology in drainage network and water level monitoring. The main products include wireless water level transmitter, bubble water level meter, radar water flow meter, radar liquid level guage, wireless pressure sensor, river flow monitoring station and online water quality analyzer etc. The products are widely used in smart city, environmental protection, municipal, chemical, power, sewage treatment, emergency rescue and other fields. Our newest products have the advantages of small size, long lifespan, high stability and reliability.

Aister Instrument (Shanghai) Co., Ltd.

Main Products:
Flow Meter, Thermal Mass Flow Meter, Turbine Flow Meter, Vortex Flow Meter, Electromagnetic Flow Meter, Gas Roots Flow Meter, Coriolis Flow Meter, Precession Flow Meter, Radar Level Meter, Ultrasonic Flow Meter
Country/Region:
Shanghai, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Aister Instrument (Shanghai) Co., Ltd. is a comprehensive enterprise that integrates research and development, production, and sales of intelligent water meters, flow meters, level meters, and flow detection equipment. The company's primary product range includes thermal gas mass flowmeters, gas (liquid) turbine flowmeters, vortex flowmeters, precession vortex flowmeters, gas roots flowmeters, ultrasonic flowmeters, electromagnetic flowmeters etc.

Lianyungang Weizidom Meter Technology Co., Ltd.

3 yrs·5.0
·Manufacturer/Factory & Trading Company
Main Products:
Water Meter, Flowmeter
Country/Region:
Jiangsu, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Lianyungang Weizidom Meter Technology Co., Ltd is a high tech enterprise specializing in the research, development, production, and sales of water meters and flow meters. Headquartered and manufactured in Lianyungang, China, Weizidom is committed to delivering high-precision, reliable, and durable measurement solutions for various industries worldwide.

Shanghai Cixi Instrument Co., Ltd.

18 yrs·5.0
·Manufacturer/Factory & Trading Company
Main Products:
Flow Meter, Flow Switch, Pressure Sensor, Level Sensor, Level Meter, pH Meter, Pressure Gauge, Chroline Sensor, Thermocouple, Manometer
Country/Region:
Shanghai, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Cixi flowmeter Co., Ltd. Was established in 2008 and since then has been dedicating itself to research and manufacture of various kinds of flowmeter. With sophisticated experience in technology and management, CIXI Flowmeter has made a name for itself as an excellent manufacturer of various kinds of flowmeter. In 2007, we have especially set up Shanghai Cixi Instrument Co. Ltd for handling the deals of Export.

Shenzhen Daxinda Machinery & Electric Equipment Co., Ltd

19 yrs
·Trading Company
Main Products:
Miniature Gas Mass Flow Controller, Gas Mass Flow Meter, Proportional Solenoid Valve, High Flow Gas Mass Flow Controller, Stainless steel Proportional Valve, Proportional Valve Driver, Digital Display Gas Mass Flow Controller, High Temperature Gas Mass Flow Controller
Country/Region:
Guangdong, China
R&D Capacity:
OEM/ODM Service
Company Profile:
Shenzhen Daxinda Mechanical and ElectricalEquipment Co., Ltd., established in 2008, specializes in the measurement and control of fluids. We offer high-quality small to medium proportional solenoid valves, thermal gas mass flowmeters and controllers, etc. Our products are widely used in medical equipment, analytical instruments, semiconductor process control, environmental monitoring, industrial and process control, biotechnology, new energy, scientific research institutions, and other industries and units. Our product range is extensive and highly customizable. We can provide targeted solutions for different markets and applications to meet the actual needs of our customers. Gas mass flow meters and controllersThe sensor adopts the stainless steel capillary thermal working principleThe gas bypass is heated evenly, corrosion-resistant, high-temperature resistant, and high-pressure resistantCombined with complex and precise manufacturing processesEnsuring the repeatability and high accuracy of the productThe components of the proportional valve in contact with the gasThe materials are 316L and FKM, FFKM, PTFE sealsFor corrosive gases, a metal seal structure is usedThe valve body is made of 316L materialElectrolytic and polishing treatments can be carried out as neededFor industries such as semiconductors that have special requirements for cleanlinessImported special 316L stainless steel materials can be usedThe 5800 series supports 485 and Modbus digital communication, and is compatible with 0-5V analog communication, optionalThe 1880 series supports 485 and Modbus digital communication, and is compatible with 0-5V analog communication, optionalCompact in size, suitable for portable productsThe 5860 series supports EtherCAT communicationThe 4800 series supports analog communication, 0-5V or 4-20mA, optionalHigh-temperature gas mass flow meters and controllers, with a temperature range up to 120ºCExplosion-proof gas mass flow meters and controllers, standard Ex ib IIC T4 GbFor small flow products, the full scale can reach 2mL/Min, 2SCCMFor large flow products, the full scale can reach 2000L/Min, 2000SLM 

Qingdao Lubo Environmental Protection Group Co., Ltd.

6 yrs
·Manufacturer/Factory
Main Products:
Gas Detector, Water Quality Tester
Country/Region:
Shandong, China
R&D Capacity:
OEM/ODM Service
Company Profile:
Qingdao Lubei Environmental Protection Group Co., Ltd. is a comprehensive high-tech enterprise integrating environmental protection research, design, production, maintenance, sales, and system integration. Its instrument product line is very comprehensive, covering five major categories: Gas/flue gas detection, water quality analysis, dust/atmospheric sampling, soil monitoring, and general laboratory instruments.

Yantai Auto Instrument Making Co., Ltd.

32 yrs
·Manufacturer/Factory & Trading Company
Main Products:
Pressure Transmitter, Flow Meter, Level Transmitter
Country/Region:
Shandong, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Yantai Auto Instrument Making Co., Ltd has advanced production equipment and high-precision import calibration equipment, it is a hightech enterprise integrating product design, research and development, production and sales. Widely used in environment protection, power, petrochemical, metallurgy, electric power, pharmaceutical, food and other industries. Products are exported to more than 60 countries and regions such as the United States, Germany, Russia, India, Vietnam, South Korea and Pakistan etc. Undertake Rosemount, Yokogawa, Honeywell and other imported brands pressure, differential pressure, liquid level transmitter maintenance business.

Guilin Sanhua Mechanical Electrical Automation Engineering Co., Ltd.

Main Products:
PLC, Inverter, Instruments, Hydraulic and Pneumatic Components, Pumps, Machine Tool, Siemens, ABB, Schneider, Phoenix Contact
Country/Region:
Guangxi, China
R&D Capacity:
OEM/ODM Service
Company Profile:
Guilin Sanhua Electromechanical Automation Engineering Co., Ltd. (SHME) was established in 2006 and has a history of 19 years. At the beginning of its establishment, SHME was committed to the comprehensive automation engineering construction of thermal power plants, hydropower plants, and palm oil factories in Southeast Asia.

Huaibei Huadian Automation Technology Co., Ltd.

12 yrs
·Manufacturer/Factory & Trading Company
Main Products:
Flow Meter, Pressure Transmitter, Signal Isolator
Country/Region:
Anhui, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Huaibei Huadian Automation Technology Co., Ltd., Founded in 2015, we have built a reputation for excellence, innovation, and an unwavering commitment to our clients' success located in the China. Instrument Industry Belt, has established a 30000 square meter intelligent factory with dozens of production lines and an annual production capacity of over one million units. Water quality analysis instruments, recorders, pressure transmitters, signal isolators and other field instruments. We are the biggest manufacturer of industrial process automation sensors and instruments in China. Our instruments are exported to 119 countries worldwide. As a supplier to Fortune 500 companies such as Siemens, ABB, LUKOIL, WEG Group, Coca Cola, etc.,  Our Core Offerings: We specialize in a comprehensive suite of solutions designed to meet the evolving demands of the modern market. We have long been committed to providing accurate, safe, and stable instruments, and can provide OEM services with a customer-centric approach. We are already working extensively in the oil and gas, water and wastewater, chemical and petrochemical industries in more than120 countries and will take further efforts to get closer to customers and respond to their needs quickly and efficiently. We are also actively recruiting channel partners from various regions to expand our business and provide localized services, creating more value for our customers! Headquartered in Hefei China, our global reach extends to 120 countries, serving a growing international clients. We are constantly looking toward the future, investing in research and development to anticipate market trends and deliver the next generation of solutions. We can make sure our the quality of our products always be good and stable. We are very glad to offer you our products, and Hope to get the long-term cooperation with you.  

Chengdu Sentec Technology Co., Ltd.

5.0
Main Products:
Pressure Sensor, Pressure Transmitter, Level Sensor, Level Transmitter, Temperature Sensor, Temperature Transmitter, Flow Meter, Density Meter, Weather Station, Wind Sensor
Country/Region:
Sichuan, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
As one of the earliest companies in China to develop and produce sensors,

Suzhou Beite Smart Instrument Co., Ltd

20 yrs
·Manufacturer/Factory & Trading Company
Main Products:
Flow Meter, Level Meter, Rotameter, Flow Transmitter, Flow Sensor
Country/Region:
Jiangsu, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Suzhou Beite Smart Instrument Co., Ltd. is a high-tech innovative enterprise integrating R&D, design, manufacturing, sales, automation instrument integration and full system services. The company is committed to providing high-precision, high-stability and high-reliability flow, level, temperature and pressure measurement solutions for customers in the field of global automation instrument measurement and control.

Jiangsu Hualiu Instrument Co., Ltd.

14 yrs
·Manufacturer/Factory & Trading Company
Main Products:
Flow Meters, Level Meters
Country/Region:
Jiangsu, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Jiangsu Hualiu Instrument Co., Ltd. is a manufacturer dedicated to the production, research and sales of industrial automation instruments. Founded in 2012, it has actively advocated the concept of "quality first, customer first" and has a history of over ten years of instrument research and production.

Jiangsu Jiechuang Science And Technology Co., Ltd.

22 yrs
·Manufacturer/Factory & Trading Company
Main Products:
Flow Instrument, Temperature Instrument, Pressure Instrument, Level Instrument
Country/Region:
Jiangsu, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Jiangsu Jiechuang Science and Technology Co., Ltd. Was established in 2000 and is a professional manufacturer specializing in instruments and electrical products. The company is located in Jinhu Industrial Park, Jiangsu Province, China, covering an area of 100, 000 square meters, with a total of 582 employees and total assets nearing 800 million RMB.

Xi'an Yunyi Instrument Co., Ltd.

16 yrs
·Manufacturer/Factory
Main Products:
Pressure Transmitter, Dead Weight Tester, Pressure Calibrator, Level Meter, Flow Meter, Density Meter, Pressure Gauge
Country/Region:
Shaanxi, China
Sample Service:
Sample Available
Company Profile:
Xian Yunyi Instrument Co., Ltd. is a professional manufacturer that engaged in the fields of pressure measurement instrument, the chief engineer, Mr Tian has more than 30 years experience on this area, and he is one of the engineers who introduced the Rosemount technology.

Wuhu Jujie International Trade Co., LTD

5.0
Main Products:
Liquid Turbine Flow Meter, Electromagnetic Flow Meter, Vortex Flow Meter, Pression Vortex Flow Meter, Gas Turbine Flow Meter, Data Recorder, Ultrasonic Fow Meter, Ultrasonic Level Meter, Oval Gear Flow Meter, Batch Filling Controller
Country/Region:
Anhui, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Anhui Jujie AutomationTechnology Co., Ltd. is located in Wuhu city, which enjoys the reputation of "Jiangdong famous city" and "Wuchu famous district". And in Hangzhou, Jiangsu, Henan, Hebei, Shandong set up offices and production bases, trained a number of experienced r & d and production personnel.

Henan Caput Instrument Co., Ltd.

5.0
Main Products:
Electromagnetic Flowmeter, Flowmeter
Country/Region:
Henan, China
Sample Service:
Sample Available
Company Profile:
Henan Kapute Instrument Co., Ltd. is a new enterprise in China specializing in the research, development, production and service of industrial process automation control and intelligent instruments. The company is located in Kaifeng, a famous ancient capital city of eight dynasties. Kaifeng Instrument Industry was founded in 1958. It has the longest history of manufacturing flow meters in China and is the largest production and testing base of flow meters in the country. The National Water Flow Measurement Station and the Quality Inspection Center for Flow Meters of the Ministry of Machinery Industry are both located here. Here, there are a large number of experienced engineering and technical personnel engaged in the production and research and development of flow meters.

Quanzhou Xixing Machinery Co., Ltd.

Main Products:
Flow Meter, Flowmeter, Pd Meter, Weighing Scale, Weigh Bridge, Scale, Weighbridge, Truck Scale, Block Machine, Brick Machine
Country/Region:
Fujian, China
Sample Service:
Sample Available
Company Profile:
We are located in Quanzhou, which is located in Southeast coastal area. The North and the South of Quanzhou is separately next to The Zhujiang Delta and The Changjiang Delta, on east, it faces to Taiwan, and the West is connecting to the inland of China. Quanzhou is one prosperous city along with the coastal area of China.

Wenzhou Huiyang Energy Technology Co., Ltd

Main Products:
Gas Station Equipment, CNG Dispenser, Fuel Dispenser, LPG Dispenser, LNG Dispenser, NGV Dispenser, Def Dispenser, Fuel Tank Dispenser, EV Charger, Power Bank
Country/Region:
Zhejiang, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Wenzhou Huiyang Energy Technology Co., Ltd, is specilize in manufacturing and selling gas station equipment in Fuel, LPG, CNG/NGV, LNG area and EV charger and power bank range.

Hebei Xukang Meter Manufacturing Co., Ltd.

10 yrs·5.0
·Manufacturer/Factory & Trading Company
Main Products:
Level Gauge, Flow Meter, Relex Level Gauge, Sight Glass, Strainer and Filter, Glass Level Gauge, Level Meter, Magnetic Level Gauge, Sight Glass Flow Indicator, Level Switch
Country/Region:
Hebei, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Hebei Xukang Meter Manufacturing Co., Ltd. (Tianjin U-ideal Instrument Co., Ltd. ) is a professional supplier and manufacturer with over two decades of experience.

Aileike TT&C Equipment (Huaian) Co., Ltd.

4.7
Main Products:
Pressure Calibrator, Marine Temperature Calibrator, Hart 475 Manual Operator, Precision Digital Pressure Gauge, Pressure Comparator, Hydraulic Pump, Portable Micro Pressure Pump, Marine Pressure Calibrator, Handheld Hydraulic Pressure Pum, Pressure Gauge Comparator
Country/Region:
Jiangsu, China
R&D Capacity:
OEM/ODM Service
Company Profile:
AILEIKE TT&C EQUIPMENT (HUAIAN) Co., Ltd. Was founded in 2014 and is located in Jinhu County, Jiangsu Province, China, known as the hometown of Dutch culture. It is a professional manufacturing enterprise that integrates research and development, design, production and sales.

Tianchang Yuheng Electric Co., Ltd.

Main Products:
Pressure Gauge, Flow Meter, Level Meter, Integrated Thermometer
Country/Region:
Anhui, China
R&D Capacity:
OEM Service
Sample Service:
Sample Available
Company Profile:
General Items: Sale of electrical equipment; Sale of mechanical and electrical equipment; Operation of wires and cables; Sale of instruments and meters; Sale of mechanical parts and components; Sale of industrial automation control system devices; Sale of distribution switch control equipment; Sale of power transmission and distribution monitoring and control equipment; Sale of pipeline transportation equipment; Sale of valves and plugs; Sale of power electronic components; Sale of chemical products (excluding licensed chemical products); Sale of building materials; Sale of building decoration materials; Sale of pneumatic and electric tools; Sale of machinery and equipment; Wholesale of electronic components; Retail of electronic components; Sale of metal materials; Sale of packaging materials and products; Installation services for general machinery and equipment (excluding licensed business, projects can be operated independently in accordance with the law as long as they are not prohibited or restricted by laws and regulations). Licensed Items: Construction engineering; Electrical installation services (projects subject to approval according to law can only be carried out after approval by the relevant departments, specific business items are subject to the approval documents or permits issued by the relevant departments).