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Exported Industrial Usage/25-50mm 50-80mm /Gas Yield 295L/Kg Acetylene Cac2 Calcium Stone/Carbide, Find Details and Price about Cac2 Calcium Carbide Acetylene Carbide from Exported Industrial Usage/25-50mm 50-80mm /Gas Yield 295L/Kg Acetylene Cac2 Calcium Stone/Carbide - Ningxia Wanding Chemical Co., Ltd