平行规 meaning in English

paralells precision
parallel gage
parallel gauge
parallel ruler

Measuring instruments for anthropometry - coordinate caliper for anthropometry
人体测量用三脚平行规
Manufacturing and distributing granite surface plates , straigt edges , squares , square rulers , parallels , vee blocks , box of all specifications , measuring instruments , tri - coordinate measuring machines accessories and varies special designed components , surface plate stand and etc
生产销售各种规格花岗石平板/平尺/直角尺/方角尺/平行规/ v型块/方箱/测量座/三座标测量机附件及花岗石各种异型构件/平板支架等