Pipe Stoppers are used to plug off pipe ends, which should be auxiliarily used with pipe couplings. 管塞用于封堵鋼管端部管口，須與管接頭配套使用。
Two containers of mercury, connected by a small-bore pipe, are mounted so as to tilt with the gyro. 兩個(gè)裝有水銀的容器用小口徑的管道連接，安裝得使它們可以隨著(zhù)陀螺傾斜。
The trap shall have straight through pipe connections, the air vent shall be serviced without breaking pipe connections and should be an open float design. 這種疏水閥應該采用直線(xiàn)穿過(guò)管道連接方式，應該是一種開(kāi)口浮子設計。
