An instrument by which the velocity of machines is measured; spec. one that indicates the speed of an engine in r.p.m.
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| 单词 | θ107626 |
| 释义 | the world > movement > rate of motion > [noun] > in the physical sciences > measurement of > instrument (10) tachometer1810 An instrument by which the velocity of machines is measured; spec. one that indicates the speed of an engine in r.p.m. velocimeter1842 An instrument or apparatus (variously constructed) for measuring the speed or velocity of engines, vessels, projectiles, etc. velocity-measurer1850 tack1963 = tachograph, n., tachometer, n. tacho1964 = tachometer, n. tach1966 = tachometer, n. Subcategories:— for measuring velocity of projectiles (3) — for measuring acceleration of moving body (1) |
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