ring pusher
... ring opening；环开口 ring pusher；环推进器 ring removal；环的拆卸 ...
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环围整流推进器 turbinepropeller
环驱式推进器 rim-driven thruster
·2,447,543篇论文数据，部分数据来源于NoteExpress
调查显示，挑战者号发射当日低温，导致火箭推进器上橡胶O行环密封圈失效，进而引起爆炸性气体泄露。
Theinvestigation showed that low temperatures on the day of the launch caused arubber “O-ring” seal on one of the rocket boosters to fail, which led to a leakof explosive gases.
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