timer

noun

a timepiece that measures a time interval and signals its end
時間間隔を計り、終わりを知らせる計時器
a regulator that activates or deactivates a mechanism at set times
設定された時刻に機械を動かしたり止めたりする調節器
an official who keeps track of the time elapsed
時間の経過を管理する職員

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