"传动装置"(mill-gearing) 包括将运动或动力传送到任何机器的每个轴、轮、鼓及滑轮以及其它器具；
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The Facebook rumor mill has been buzzing for more than a year that the big social-networking company might be gearing up to build its own smartphone sometime soon.
FORBES: Why Zuckerberg Has No Desire To Build A Facebook Phone
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