硬度标尺
|
HRA, HRB, HRC, HRD,
HRE, HRF, HRG, HRH,
HRK, HRL, HRM, HRP,
HRR, HRS, HRV
|
15N, 30N,45N, 15T, 30T,45T, 15W, 30W,45W,
15X, 30X,45X,
15Y, 30Y, 45Y
|
HRA, HRB, HRC, HRD,
HRE, HRF, HRG, HRH,
HRK, HRL, HRM, HRP,
HRR, HRS, HRV, 15N, 30N,45N, 15T, 30T,45T, 15W, 30W,45W,
15X, 30X,45X,
15Y, 30Y, 45Y
|