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来源：雅诚德英语网
Second, it is wear-resisting, replaceable, so greatly extend the service life of the driving part.
二是耐磨、可更换，大大延长了传动部件的使用寿命；
Second, it is wear-resisting, replaceable, so greatly extend the service life of the driving part.
二是耐磨、可更换，大大延长了传动部件的使用寿命；