本標準適用于裝置在船舶甲板、艙壁或其它類似構(gòu)件上供標稱直徑 6 mm 至 20 mm 銅管用之貫穿管套。
This Standard provides for through pieces for copper pipes of nominal diameter of six to twenty mm fitted to decks, bulkheads, and the like of ships.
