GB/T 6091-2022
刀口形直尺
Knife straight edge
2022-07-11
JJG 63-2007
刀口形直尺检定规程
Verification Regulation of Straight Edge
2007-02-28
DIN 874-2
Straightedges - Part 2: Knife-edge straightedges - Dimensions and technical delivery conditions
产品几何技术规范（GPS）.直尺.第2部分:刀口直尺；尺寸、交货技术条件
2003-11-01