depth gage

1. Machining spine depth plug gage based on previous structure size often caused heat treatment deformation with difficulty of satisfying the drawing requirements of arc size, surface roughness go and no go size, which resulted in high reject percentage.
   键槽深度塞规按照以往的结构尺寸进行加工，易产生热处理变形，且磨削出的圆弧尺寸、表面粗糙度及通、止端尺寸难达到图纸要求，存在很高的废品率。
2. Structure Improvement for Spline Depth Plug Gage
   键槽深度塞规结构改进

noun

1. a gauge for measuring the depth of grooves or holes or other concavities

   Synonym:    depth gauge