洛氏硬度计检测
JJG(机械) 6-1990 磨具洛氏硬度计检定规程
Verification Regulations for Rockwell Hardness Tester for Abrasive Tools
塑料球压痕硬度计检测
JJG 369-1993 塑料球压痕硬度计检定规程
Verification Regulation of Plastic Ball Indentation Hardness Testing Machine