noreen_新浪博客 ... Caution is the parent of safety. 谨慎小心是安全之源。 Chains of gold are stronger than chains of iron. 金链锁人比铁炼更牢靠。 Change lays not her hand upon truth. 真理不变 ...
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Fan gear mainly by the box, planetary gear speed change mechanism, and so on.
风机的变速箱主要由箱体、行星轮系和变速机构等构成。
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