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SHANDONG SHING CHEMICAL is a professional company engaged in refrigerant gas and PTFE product. Our factory is the biggest refrigerant gas company in north China. The main products include R125, R134a, ...
Jinan Guantong is a professional company engaged in refrigerant gas and PTFE product. Our factory is the biggest refrigerant gas company in north China. The main products include R125, R134a, R134a ...