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Coarse Lump 80-120mm Calcium Carbide for Acetylene Generation with Consistent Gas Output, Find Details and Price about Coarse Lump 80-120mm Calcium Carbide Acetylene Generation Calcium Carbide from Coarse Lump 80-120mm Calcium Carbide for Acetylene Generation with Consistent Gas Output - Wuhai TYWH Chemical Industry Co., Ltd.