静音止回阀 HC42X-10C HC42X-16C 防水锤铸钢静音止回阀 DN200 ¥236.00 铸钢旋启式静音止回阀 HC42X-16C DN150 水泵出口止回阀 ¥236.00 铸钢防水锤消声 静音止回阀 HC42X-10C HC42X-16C DN350 ¥136.00 橡胶瓣阀瓣铸钢静音止回阀 HC42X-16C HC42X-25C HC42X-10C ¥236.00 HC42X-16C DN50 软密封排水管道专用法兰式止回阀 ¥136.00 HC42X-16C防水锤缓闭式单向阀 DN50静音止回阀无噪音、安全 ¥236.00