中文:平直度测量仪;英文:flatness and straight-ness measuring instrument

解释
中文:平直度测量仪;英文:flatness and straight-ness measuring instrument的原理;中文:平直度测量仪;英文:flatness and straight-ness measuring instrument的定义;中文:平直度测量仪;英文:flatness and straight-ness measuring instrument是什么。
测量零部件的平面度、直线度、同轴度以及用作导向的一类光学计量仪器。