These two compartments are synovial cavities, which consists of an upper and a lower synovial cavity.
这两个隔室是滑膜腔，由上、下滑膜腔组成。
The same force tends to reduce the seal on the pressure side with the result that bonnet cavity and the valve stem packing are nearly always subjected to maximum pipeline pressure.
而压力侧以相同的力削弱了密封，这样使阀盖腔室和阀杆填料几乎总是承受最大管道压力。
The inner open space or cavity of a tubular organ, as of a blood vessel or an intestine.
腔管状器官的内部腔室或腔，窝，比如在血管或肠中的腔。
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