piston
plural of crown ward
A surname from Hungarian.
A solid disk or cylinder that fits inside a hollow cylinder, and moves under pressure (as in an engine) or displaces fluid (as in a pump)
plural of myelomere
整備士はエンジンを再組み立てする前に、中空の筒の内側に収まり、圧力で動く固い円盤または円柱(ピストン)の摩耗を点検した。
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