Normally, the cumulated water in top cover is drained to cumulated water well by gravity drainage, in emergency situation, the water would be drained by the self-priming pump installed in gallery.

顶盖内积水正常情况下通过自流排水排至积水井，紧急状态下通过装在廊道内的自吸泵排水。

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The gravity of this water column continuously produces the vacuum and so a vacuum pump is not needed.

水柱的重力不断地引起真空，所以真空管是不需要的。

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On floating. the gravity settlement centrifuge model for sure, completed the spindle motor and pump, hydraulic converter, special type of device, etc.

在对上悬式重力沉降离心机的型号进行确定后，完成了对主轴电机、变频器、液压泵、液压泵专用电机等器件的选型；

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Hydro dams can be reversed and pump water uphill so that the next day, when gravity pulls the water back down, the turbines spin to make electricity.

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