watchman's clock
noun1
A watchman's detector in which the apparatus for recording the times of visiting several stations is contained within a single clock.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.
noun
A watchman's detector in which the apparatus for recording the times of visiting several stations is contained within a single clock.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.
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