单词 | rachet |
释义 | rachetnoun rach·et less common spelling of ratchet 1 : a mechanism that consists of a bar or wheel having inclined teeth into which a pawl drops so that motion can be imparted to the wheel or bar, governed, or prevented and that is used in a hand tool (such as a wrench or screwdriver) to allow effective motion in one direction only 2 : a pawl or detent for holding or propelling a toothed wheel |
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