A.1500 B.1000 C.1800
A.125℃ B.145℃ C.150℃ D.140℃º
A.蘑菇頭與限流環(huán)的間隙 B.轉(zhuǎn)子轉(zhuǎn)速 C.定子角度 D.鉆頭壓降