Perpendicularity - is the condition of a surface, axis, or line, which is 90 deg. From a datum plane or a datum axis.

垂直度-条件是表面，轴，或线，这是90度的基准平面或基准轴。

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Perpendicularity - is the condition of a surface, axis, or line, which is 90 deg. From a datum plane or a datum axis.

垂直度-条件是表面，轴，或线，这是90度的基准平面或基准轴。

youdao