A.30° B.60° C.45° D.15°
A.常流式全時(shí)間動(dòng)力轉(zhuǎn)向 B.常壓式全時(shí)間動(dòng)力轉(zhuǎn)向 C.兩者都有 D.都不對
A.油位過低 B.油起泡沬 C.主油壓過低 D.熱交換器泄漏