单项选择题
布氏硬度(HB)与洛氏硬度(HRC)之间的近似关系是()
A.1HB=10HRC
B.1HB=15HRC
C.1HB=20HRC
D.1HB=25HRC
点击查看答案&解析

单项选择题
A.1HB=10HRC
B.1HB=15HRC
C.1HB=20HRC
D.1HB=25HRC
微信扫一扫,加关注免费搜题