What is the use of pulleys?

滑轮的作用是什么？

youdao

The same applies to chain pulleys.

同样适用于链滑轮。

youdao

He measured the pulleys and found them to be the exact size.

他量了量滑轮，发现大小正好合适。

youdao

He measured the pulleys and found them to be the exact size.

他量了量滑轮，发现大小正好合适。

youdao