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This planetary gear mechanism will have good future because of its simple manufacture and convenient assembly.
这种行星齿轮机构的加工简单，装配方便，具有应用前景。
youdao
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This planetary gear mechanism will have good future because of its simple manufacture and convenient assembly.
这种行星齿轮机构的加工简单，装配方便，具有应用前景。
youdao