包含四个带有多个单方向“闸门”(瓣膜)的腔体。瓣膜的作用是引导血液流向一个特定的方向。
Consists of four Chambers with one-way doors (valves) between to direct the blood to flow in a specific direction.
水力自控闸门是借助水力和重力作用，在一定的水位条件下，随流量的变化，自动启闭的自动化闸门。
Automatic water sluice gate is under the waterpower and action of gravity, in the given water height condition; and it start and stop automatically as the flux change.
闸门是水利工程建设中的关键设备，它对该工程的正常运行和充分发挥效益起着十分重要的作用。
Steel gate is the key equipment in hydro construction project; it makes very important use for the normal operation and fully creating benefit of the project.
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