ไม่มีตะกั่วไม่มีทองแดงป้องกันสิ่งแวดล้อมพิเศษบิสมัท

Production, processing and sales of copper products, hardware products, alloy products, machinery and equipment; distribution of copper products, hardware products, alloy products, non-ferrous metal materials, machinery and equipment; self-operated and agency import and export business of various co