If the sump（）were to rise this would indicate water leakage into the oil an d an investigation into the cause must be made.
举一反三
- In a disk-type lubricating oil purifier, ____. A: The purifier driving gears are lubricated by the reclaimed B: Oil as it leaves the bowl all dirt and sludge are automatically discharged with the cooling water C: Sealing water must never be supplied until after oil is fed to unit D: Deterioration of the bowl ring gasket will cause the purifier to lose its water seal
- Here some oil in the oily water separator， as a result of its lower （）， will separate and rise into the oil collection space.
- An investigation was made into the accident, ( ) fifty people were killed.
- 2). Oil prices would rise (swiftly) in a peak oil era. A: rapidly B: quickly C: extensively
- If you must enter water on which there is an oil fire, you should ______.