| ratch | <zoology> Same as Rotche. Source: Websters Dictionary (01 Mar 1998) |
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| ratchet | 1. A pawl, click, or detent, for holding or propelling a ratchet wheel, or ratch, etc. 2. A mechanism composed of a ratchet wheel, or ratch, and pawl. See Ratchet wheel, below, and 2d Ratch. Ratchet brace, a circular wheel having teeth, usually angular, with which a reciprocating pawl engages to turn the wheel forward, or a stationary pawl to hold it from turning backward. In the cut, the moving pawl c slides over the teeth in one direction, but in returning, draws the wheel with it, while the pawl d prevents it from turning in the contrary direction. Origin: Properly a diminutive from the same word as rack: cf. F. Rochet. See Ratch, Rack the instrument. Source: Websters Dictionary (01 Mar 1998) |
| ratch | mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one direction |
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| ratch | mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one direction |
| ratch | move by degrees in one direction only, as of toothed wheels |
| ratch | move by degrees in one direction only, as of toothed wheels |
| ratch | a screwdriver with a ratchet (so the blade turns in only one direction) and a spiral in the handle (so the blade rotates) with downward pressure on the handle |
| ratch | toothed wheel held in place by a pawl or detent and turned by a lever |
제품명 |
판매사 |
보험코드 | 성분/함량 | 구분/보험급여 |
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제품명 |
판매사 |
보험코드 | 성분/함량 | 구분/보험급여 |
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