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。

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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。

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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。

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