The lower surface roughness and smooth microform by electrochemical finishing not only enhance highly the life of gear, but reduce the noise.
齿面经过脉冲电化学光整加工后表面粗糙度低、微观几何形貌平滑，不仅使齿轮寿命大幅度提高而且工作噪音也大幅度降低。
The master index should offer extended access, but should not be a replacement for the title elements or the internal index pages of each microform.
主索引宜提供多种查找方法，但不宜替代标题要素或每个缩微品的内部检索页。
The master index should offer extended access, but should not be a replacement for the title elements or the internal index pages of each microform.
主索引宜提供多种查找方法，但不宜替代标题要素或每个缩微品的内部检索页。
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