Add oil if the indicated level is too low. Make sure the oil conforms to the manufacturer's recommended viscosity.
如果油表显示的油压太低，需要加油，以确保油能符合制造商的推荐粘度。
2
If air pressure than the standard oil bubble rising fast, explain this oilviscosity is low.
如果比标准空压机油中气泡上升速度快，说明这种油的粘度偏低。
3
Smaller than the oilviscosity of air, temperature, pollution, and thus can be used for high-speed machinery, apparatus and radioactive devices, but its load capacity than the oil is low.