Underground service line valves and fittings 地下管道閥門和配件
Widths across flats for bolts , screws , valves and fittings 第1部分:螺栓螺釘閥門和配件用扳手開(kāi)口度
Specification for flanges and bolting for pipes , valves , and fittings 管子閥門和配件用法蘭和螺栓連接規(guī)范
Foundry products - cast steel and nickel alloy castings for pumps , valves and fittings enclosures and internal components 鑄造產(chǎn)品.泵閥門和配件用鑄鋼件和鎳合金鑄件
Maintenance service activities for valves and fittings in housing schemes - contribution to water consumption control 家用閥門和配件的維修服務(wù)活動(dòng).對(duì)控制水消耗的作用