The form of the tool used must exactly coincide with the profile of the thread to be cut, i. e. , triangular tools must be used for triangular threads, and so on.
使用的刀具外形必须正好与要切削螺纹的轮廓一致，即三角形刀具必须用于三角形螺纹等等。
E. Adjust the screws at three directions. Make them vertical and the upper and lower pivot center coincide with each other.
调治 地弹簧三个偏向的螺丝。连结门扇垂直，及上下转动轴心重合。
This serves at a later stage in other contexts (e. g. tables) for the identification of the measuring run. it nees not necessarily coincide with the file name.
稍后这在其它框架下(如表格)充当测量过程的证明，不必非要与文件名相符。
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