适用于旋转件和静止件，在恶劣环境中工作的部件，如燃烧室，涡轮叶片，导向叶片等。

It is applicable to rotating and stationary components that work in the harsh environment, such as the combustion chamber, turbine blades, turbine guide vanes, etc.

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第一件事,你们立马可以看出来,’与v1方向总是一致。，v2，prime，is，always，in，the，same，direction，as，v1。,这是极其明显的，因为第二物体静止？

The first thing that you already see right away is that v2 That's completely obvious, because the second object was standing still, remember?

youdao

使零件不致长期处于静止状态，以保证表机的运转性能。

The part is not in a static state for a long time, so as to ensure the running performance of the machine.

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