手动减压阀,手动蒸汽减压阀,200P水用减压阀,Y42X,Y42F,Y43H,Y45H,定...答:铜比例式减压调压阀Y43X-16T Y43H-16C Y43H-25C Y43H-40C Y43H-64C Y43H-100C Y45H-16C Y45H-25C Y45H-40C Y45H-64C Y45H-100C 手动减压阀,手动蒸汽减压阀,200P水用减压阀,Y42X,Y42F,Y43H,Y45H,定比式减压阀,全铜比例式减压阀价格黄铜 各种减压阀系列,铜定比式减压阀,可根据具体要求...