knife edge ruler

knife edge ruler, Total:4 items.

In the international standard classification, knife edge ruler involves: Linear and angular measurements.

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, knife edge ruler

• GB/T 6091-2004 Knife straight edge
• GB/T 6091-2022 Knife straight edge

National Metrological Verification Regulations of the People's Republic of China, knife edge ruler

• JJG 63-1994 Verification Regulation of Straight Edge
• JJG 63-2007 Straight Edge

Others:   knife edge ruler.