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、游標卡尺、內徑和外徑千分尺、鋼卷尺、塞尺、千分表、深度千分尺、線(xiàn)規、半徑規、螺距規)是一種常用量具。
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