a hinged or pivoted device adapted to fit into a notch of a ratchet wheel to impart forward motion or prevent backward motion
英
美
- 棘爪；一种枢轴或转轴器械，能与齿轮缺口或齿间吻合来前进或防止后移
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
