J641W-64P-DN150铸钢导热油不锈钢蒸汽碳钢波纹管法兰截止阀DN32 40 50 ¥338.00 J641W-64P-DN200J41H-16C法兰铸钢截止阀dn25/导热油锅炉铸钢截止阀dn50精 ¥338.00 J641W-64P-DN300J41T-16法兰截止阀铸铁蒸汽截止阀DN15 20 25 32 40 ¥338.00 J641W-100P-DN15截止阀锅炉高温蒸汽导热油铸钢氨用法兰阀门 ¥338.00 J641W-100P-DN20铸钢法兰水管道WCB手动截止阀J41H-16/25C DN65 50 ¥338.00 J641W-100P-DN25不锈钢铜合金法兰手动阀门 ¥338.00