| 单词 | planet gear |
| 释义 | planet gearnoun Machinery.any of the gears in an epicyclic train surrounding and engaging with the sun gear. Also called planet wheel . Origin of planet gearFirst recorded in 1915–20 Words nearby planet gearplanetary, planetary nebula, planetary precession, planetesimal, planetesimal hypothesis, planet gear, planetoid, planetology, plane tree, plane trigonometry, planet-struck Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 |
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