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Grade E word(s):

链齿 [lian4 chi3] Zahnkranz (S)







GbEngViet
脱轨器,转撤器通过在不同大小的扣链齿轮间移动链条而转换自行车齿轮(换档)的装置 A device for shifting gears on a bicycle by moving the chain between sprocket wheels of different sizes.