Mechanics. Designating an enclosed two-speed epicyclic gear originally designed for use on bicycles. Cf. crypto, adj. Now historical and rare.
| 单词 | θ201599 |
| 释义 | society > travel > means of travel > a conveyance > vehicle > vehicle propelled by feet > [noun] > cycle > parts and equipment of cycles > gears (7) crypto-dynamic1883 Mechanics. Designating an enclosed two-speed epicyclic gear originally designed for use on bicycles. Cf. crypto, adj. Now historical and rare. crypto1886 = crypto-dynamic, n. Obsolete. tricoaster1908 a combination of a three-speed gear with a ‘coaster’ brake on a cycle. derailleur gear1930 A bicycle gear in which the ratio is changed by switching the line of the chain (while pedalling) so that it jumps to a different sprocket on the… Subcategories:— control operated by twisting (1) — gear-box (2) |
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