A.偏向遞紙叼牙 B.偏向滾筒叼牙 C.最遠點 D.最近點
A.3mm B.4mm C.5mm D.6.5mm
A.0.02mm~0.04mm B.0.03mm~0.06mm C.0.04mm~0.08mm D.0.4mm~0.8mm