空间直线度误差  spatial straightness error

直线度误差的修正  straightness error corrected

直线度误差分离技术  roundness error separation

轴线直线度误差  axis straightness error

不垂直度误差  Non-perpendicularity between horizontal axis and vertical axis; Non-perpendicularity between horizontal axis and v

垂直度误差  Perpendicularity error; squareness error

等误差直线逼近  Equal-error linear approaching method; equal error straight line approach

等误差直线逼近法  equal error beeline approaching method

一次直线误差  A linear error

轴线直线度  axis straightness

曲线—直线校正法  curve-beeline correction

3级直线差动机构  three-level straight line differential mechanism

波束准直误差  a bad job

垂直误差  Vertical difference; Error of perpendidicularity; perpendicular error; vertical error

刀口直线度  straightness of edge

二维直线度测量  Two-dimensional straightness measurement

二自由度直线运动  linear motion with two D O F

非接触式直线度测量  un-contact straightness measuring

钢管直线度  straightness of steel pipe