... nullifiedbond失效证券 nullifier自动零位器 nullify使等于零 作废 ...
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自动对刀原理是在滚刀轴和工件轴上各加装一光电编码器，合理设置各轴光电编码器零位信号与各自的机械零位重合。
By installing two photoelectric encoders on the hob axis and workpiece axis, the zero position signals of photoelectric encoders coincident with each mechanical zero of two axis is reasonably set.
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