H71H-16p-DN100H71H-16C/P/R 铸钢/不锈钢对夹式止回阀单向阀止逆阀DN50 ¥338.00 H71H-16p-DN150H71H-16P不锈钢对夹式止回阀201/304/316单向阀止逆阀DN ¥338.00 H71H-16p-DN20071H/W-16P不锈钢304对夹式止回阀H71光面锅炉配件单向阀DN5 ¥338.00 H71H-16p-DN250H71H-16C/25C铸钢WCB对夹式止回阀WCB碳钢蝶形单向阀H71 ¥338.00 H71H-16p-DN300H71H-16C 碳钢对夹式止回阀 DN15 20 25 40 50 6 ¥338.00 Z562Y-200C DN50 水蒸气高压焊接式闸阀 ¥570.00