术语dressing lead是什么意思啊

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前两天在一片外文中看到这个术语，一直查不到是什么意思，希望各位大侠给指点一下 ，学生不胜感激。  下面是这一段外文
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For conventional dressing, the dressing lead plays a
* d" D, P5 m$ L. W) _8 D( }0 \very important role in opening up the wheel surface
. Q9 F+ i: R3 c& d8 {6 S  ~* vbecause of the helix feature. The large dressing lead normally
gives a more open surface, but the ground component
* C' Z6 b* l  [' \surface roughness will be greater. The dressing lead
is restrained by the surface finish requirement.
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wiminc

修整导程：
导程=横向移动速度/砂轮转速。

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