单词 | ring gear |
释义 | ring gearEngineering noun A gear in the form of a ring, having teeth on its inner circumference; (in later use) such a gear or (later) any gear on the flywheel of an internal-combustion engine which is driven by the pinion of a starter motor, so communicating power from the motor to the engine. OriginMid 19th century; earliest use found in U.S. Patents. |
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