distance constant meaning in English

距离常数
距离振幅曲线

As the method of center distance varing was adopted and the technologe was differ from the condition of center distance constant , the gear concordance of abrasion rate on the tooth face of gears was improved obviously especially in the big gear
由于采用了变更中心距的方法以及与定中心距的工艺不同，齿面研磨率的一致性得到明显的改善，特别是大齿轮上更是如此。