Magnesium Oxide, Ammonium Chloride, Magnesium Sulfate manufacturer / supplier in China, offering High Quality Industry Grade Cac2/Cal Cium Carbide CAS: 75- 20-7 Different Size 50-80mm, China Manufacturer Cal Cium Carbide 25mm-50mm, 50mm-80mm, 80mm-120mm Cac2, High Quality CAS No 9006-03-5 Chlorinated Rubber for Industrial Applications and so on.