可か逆ぎゃく機き関かんかぎゃくきかんMeanings1nounreversible engineTechnical term in thermodynamics and engineering for an ideal engine that can operate in reverse, returning to its initial state without energy loss.可か逆ぎゃく機き関かんは理り論ろん上じょうの理り想そう的てきな熱ねつ機き関かんである