In the roundness error measurement of inside sections of the oil film bearing, because of the oil slots and the oilholes, a large amount of invalid data can be brought.
在测量油膜轴承锥套内部圆度误差过程中，由于内表面有许多油槽和油孔，测量过程中产生了大量无效数据。
2
"Peak oil", if oil means the traditional sort that comes cheaply out of holes in the ground, probably will arrive soon.
如果石油是指廉价地采自地下洞穴的传统能源，那么“石油峰值”会很快到来。
3
You have to mix oil into the gas in a two-stroke engine because the holes in the cylinder wall prevent the use of rings to seal the combustion chamber.