railway key
(group theory) Any (often, but not necessarily, abelian) group whose binary operation is called addition.
made in imitation; artificial, especially of a poor quality
plural of rainbow family
(rail transport) A key that allows one to lock and unlock doors to railway carriages and compartments, typically only permitted to railway employees.
点検の前に、係員は施錠された区画を開けられるよう、列車の車両の扉を施錠・解錠するための鍵を点検した。
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DiQt
Free
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