Jisho

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Noun, Noun or verb acting prenominally
1. ratchet; toothed wheelSee also 爪車
Wikipedia definition
2. Ratchet (device)A ratchet is a device that allows continuous linear or rotary motion in only one direction while preventing motion in the opposite direction. Because most socket wrenches today use ratcheting handles, the term "ratchet" alone is often used to refer to a ratcheting wrench, and the terms "ratchet" and "socket" are closely associated in many users' minds.
Read “Ratchet (device)” on English Wikipedia
Read “ラチェット” on Japanese Wikipedia
Read “Ratchet (device)” on DBpedia

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