diaphragm-sealed piston pump 隔膜密封式活塞泵
semi-sealed piston 半封闭活塞
semi-sealed piston compressors 半封闭活塞式制冷压缩机
The core of a steam engine is a cylinder that is sealed at one end and has a moving piston at the other.
蒸汽机的核心是汽缸。它一端密封，另一端有个可以移动的活塞。
The space above the piston is now sealed due to the inlet valve closing and the exhaust valve having already closed.
由于进气门关闭、排气门也已关闭，现在活塞上部的空间被密封了。
Apply to reciprocating motion of hydraulic cylinder piston rod sealed device can also be used to cover the static flange seal.
适用于液压缸活塞杆往复运动用密封装置，也可用于法兰端盖的静密封装置。
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