This standard specifies the surface characteristics of EDM surface roughness comparison samples for comparison with the surface of workpieces processed by EDM methods through tactile and visual senses.
GB/T 6060.3-1986 history
2008GB/T 6060.3-2008 Surface roughness comparison specimen.Part 3:Spark-eroded,shot-blasted,gritp-blasted,lapped,filed and polished surface