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 |