A.向下壓手柄 B.向上提手柄 C.順時(shí)針旋轉(zhuǎn)手柄 D.逆時(shí)針旋轉(zhuǎn)手柄
A.1 B.2 C.3 D.4
A.2900r/min B.3000r/min C.3300r/min D.3330r/min