“sector gear”的概念、定义、翻译、参考文献-科学参考

单词	sector gear
释义	sector gear [`sek·tǝr ´gir] ^{DESIGN ENGINEERING} 1. A toothed device resembling a portion of a gear wheel containing the center bearing and a part of the rim with its teeth. 2. A gear having such a device as its chief essential feature. ^{MECHANICAL ENGINEERING} A gear system employing such a gear as a principal part.
随便看	underearth underfeed stoker underfill underfit stream underfloor raceway underflow underflow conduit underground underground burst underground gasification underground geology underground glory-hole method underground ice underground milling underground stem underground stream underhand stoping underhand work underhead crack underhole underhung crane underlap underlay underlay shaft underlie

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