A.油環(huán)不轉(zhuǎn)B.油質(zhì)較差C.風(fēng)管漏氣D.油位低
A.斷油B.油質(zhì)進(jìn)水C.油泵工作不正常D.磨礦濃度高
A.軸B.后護(hù)板C.前護(hù)板D.葉輪