Hangzhou Yanshan Import & Export Trade Co. ltd. are registerred in Hangzhou. The company specialize in processing and exporting of the instruments. It can be meet demand for arrange producing all kinds of meters. There is Yanshan Meter General Factory in Jiangsu. There are producing five kinds products: oval wheel flow meter, glass rotor flow meter and constant flow pump, Rotor wing flow meter, Spiral Rotor flow meter, Rotary piston flow meter, pump and so on. The products are all passed ISO9001 international quality management system authentication.