A.1mmB.1.5mmC.2mmD.2.5mm
A.2mmB.3mmC.6mmD.8mm
A.順時(shí)針和逆時(shí)針B.順時(shí)針和順時(shí)針C.逆時(shí)針和逆時(shí)針D.逆時(shí)針和順時(shí)針