Opening sealed subsurface drain line manways to attempt to localize the source of tritium into the system.
打开密封的地下水疏水管道人孔以试图定位进入系统的氚源。
A drain beneath his bar top was installed several months after opening.
他酒吧吧台下方有一根下水管是开业数月后才安装的。
Opening and closing of the mechanical seal and water seal combined floor drain are realized by the change of water flow entering the floor drain.
通过进入地漏水流的变化，实现机械密封与水封组合地漏的打开与关闭。
Screw type drain valve, convenient opening.
旋紧式泄水阀，开启方便。
Screw type drain valve, convenient opening.
旋紧式泄水阀，开启方便。
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