an outer wheel which revolves around the central wheel in an epicyclic or planetary gear.
| 单词 | θ214360 | 
| 释义 | society > occupation and work > equipment > machine > parts of machines > wheel > 			[noun]		 > cog or gear > with axis rotating around another > planet (5)		 planet wheel1799 an outer wheel which revolves around the central wheel in an epicyclic or planetary gear. planet pinion1908 a planet wheel, esp. one significantly smaller than the sun wheel. planet1912 Mechanics. = planet wheel n. at compounds 2. planet gear1916 = planetary gear n. at planetary, adj. n.compounds. planetary1941 Mechanics. A planetary gear; a planet wheel.  | 
	
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