A.潤滑油油質(zhì)不合格 B.潤滑油箱油位低 C.供油量不均勻 D.回油不暢
A.0.4MPa B.0.45MPa C.0.3MPa D.0.5MPa
A.0.1 B.0.2 C.0.3 D.0.4