排液管的英文：
discharging tube

tube是什么意思：
n. 管子；软管；内胎；地铁；电视
v.把…装管；把…弄成管状；用管输送；乘地铁；不及格

The tubes are individually connected in order to the tubes of a multiple manometer
这些总压管依次分别连接到一个多管压力计的各个管子上。

darcy impact pressure tube
达喂力管

inner core tube
内倒望远镜

In London, the use of the Tube has ballooned.
在伦敦，坐地铁的人激增。

The tubing needs to be jacketed.
管道系统需要装护套。