ETYMOLOGY: “SHUTTER DOG”
In engineering, a dog is a tool or part of a tool that prevents movement or imparts movement by offering physical obstruction or engagement of some kind.
It may hold another object in place by blocking it, clamping it, or otherwise obstructing its… https://t.co/r9mSt6xoMs
Source date (UTC): 2020-04-28 02:51:45 UTC
Original post: https://twitter.com/i/web/status/1254966502672957446
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