Purchase Qty. Reference FOB Price
10-49 Pieces US$30.00
50-99 Pieces US$15.00
100+ Pieces US$10.00
Product Description
Product Description 1, Introduction Standard gas is a term derived from the gas industry, and it belongs to the category of standard substances. Standard materials are highly uniform, stable, and accurate measurement standards. They have the basic function of reproducing, preserving, and ...