总垂直误差(TVE)：航空器实际飞行的气压高度和指定的气压高度(飞行高度层)之间的垂直几何差值。
Total Vertical Error (TVE) : Vertical geometric difference between barometric altitude in actual flight of aircraft and designated barometric altitude (flight level).
通过讨论，指出了三棱镜精度的主要标志是垂直度误差的提法不妥。
Inappropriate formulation, Which the main mark of the precision of triangular prism is the verticality error, is corrected by discussion.
它不仅可以测量内径、外径和直线度误差，还可以测量孔中心距、锥度和同轴度、垂直度等位置误差。
It can measure not only the inner diameter, outer diameter and linearity error, but also the center distance between holes, taper and position errors such as coaxality, verticality, etc.
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