常见例句雙語例句Remove the outer cover of the bearing to see the lubricating oil is normal or not, if the color is not in normal condition, the lubricating oil has to be replaced.拆下軸承外蓋，檢查潤滑油是否清潔，如發現色澤不勻，即需更換潤滑油。 返回 outer bearing cover