How do I translate this?

Personally, I think it is the “pressure relief diagram for the lubricant tank at a high elevation”. It is best to make a judgment by considering other contexts.

““The lubricating oil tank high-point vent diagram” would be more appropriate!

-- Since it’s a file title, it depends on the content. Firstly, the lube oil reservoir should be the lubricating oil tank or storage tank. Well, vent might refer to something like an air outlet or a gas release pipe. Drawing should probably be a blueprint. High has three possibilities: 1) advanced. This place doesn’t seem quite right. 2) High. It doesn’t seem quite right either. 3) High-pressure. It seems kind of interesting. Temporarily translated as: Diagram of high-pressure exhaust port of lubricating oil tank --

Generally, gases are vented at high points. Agree to the layout diagram at the high point on the third floor.

I’m not entirely sure technically, but I still agree with the translation on the fourth floor. Thank you everyone!

4# FILTRATION-MAN: First of all, “high” cannot mean “high pressure” in isolation; it simply means “a high level”. Secondly, lubricating oil is only subjected to high pressure during use; ordinary lubricating oil is at normal pressure inside containers, as storing it under high pressure can cause air to enter the oil. During use, an increase in temperature affects its performance； Once again, after use, the lubricating oil is returned to the tank. The high temperatures encountered during use cause the lubricating oil to contain some gases and to undergo partial degradation; it is therefore necessary to release these gases. That’s why there is a vent pipe at the top of the lubricating oil tank, which usually leads directly to the atmosphere, but the pipe opening is directed downward to prevent dust and other impurities from entering. So, my suggestion is “the venting diagram at the top of the lubricant tank (structure)””