The world's first lubricating oil was from petrochemical sources.
举一反三
- _____ is arranged for cleaning the lubricating oil in the system and clean oil can be provided from a storage tank.
- The lubricating oil is pumped from the drain tank， very often with （） in the suction line.
- How much oil does the Middle East produce today A: most of the world's oil supplies. B: 2/3 of the world's oil supplies. C: 1/3 of the world's oil supplies. D: 1/4 of the world's oil supplies.
- When the cited information comes from different sources, the in-text reference should include all the sources.
- In the lubricating oil system of the main engine, the function of _____ is to adjust the amount of lubricating oil entering the lubricating oil cooler according to the temperature of the lubricating oil. A: self cleaning filter B: lubrication oil pump C: three-way valve D: by-pass filter