半径规 meaning in English
radius caliper
radius gage
radius gauge
Examples
- Straightedge rule ( square rule , slide gauge , inside and outside micrometer , steel tape , feeler , dial gauge , depth micrometer , wire gage , radius gage , thread pitch gage ) is a kind of common measuring tool
直尺（角尺、游标卡尺、内径和外径千分尺、钢卷尺、塞尺、千分表、深度千分尺、线规、半径规、螺距规）是一种常用量具。