A.0.010mm B.0.015mm C.0.006mm
A.0級(jí) B.1級(jí) C.2級(jí)
A.1/4轉(zhuǎn)和1/2轉(zhuǎn) B.1/4轉(zhuǎn)和1/3轉(zhuǎn) C.1/3轉(zhuǎn)和1/2轉(zhuǎn)