perpendicularity
英 美
This paper analysis NC machine tool perpendicularity error.
文章分析数控机床垂直度误差。
Exact perpendicularity between the components must be maintained.
各分量之间必须严格地保持互相垂直。
Good, the tower has been on its position, check its perpendicularity.
好了！该塔已就位了，检查一下它的垂直度。
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