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。
The accounting year of a joint venture shall coincide with the calendar year, i. e. from January 1 to December 31 on the Gregorian calendar.
合营企业会计采用日历年制，自公历每年1月1日起至12月31日为止为一个会计年度。
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