A.速度低,輪徑差要求小 B.速度高,輪徑差要求小 C.速度高,輪徑差要求大 D.都一樣
A.0.75mm B.1.5mm C.14mm D.28mm
A.0.6~0.9mm B.0.2~0.3mm C.0.4~0.5mm D.0.5~0.6mm