snail-wheel
Not frustratable.
(biology) A living creature's ability to move by orienting itself by gravitational forces / (biology) A downward movement
plural of thecaphore
In some striking timepieces, a rotating piece with a spiral periphery having notches so arranged as to determine the number of strokes made on the bell.
時刻になると、その時計の渦巻状の外周にノッチを持ち打鐘回数を決める打鐘輪が回転し、機構が正しい回数だけ鐘を鳴らした。
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