Ningxia Darong Chemicals & Metallurgy Co., Ltd.
[ Manufacturer Trader ]Main business are Calcium carbide, Calcium cyanamide, Dicyandiamide, 50%sl cyanamide, Thiourea, Barium salt, Waste residue cement
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[ Manufacturer Trader ]Main business are Calcium carbide, Calcium cyanamide, Dicyandiamide, 50%sl cyanamide, Thiourea, Barium salt, Waste residue cement