An example of such a machine is the device used in old-fashioned Wells to hoist up the water bucket.

在老式水井中用来提上水桶的装置就是这类机械的一个例子。

youdao

An example of such a machine is the device used in old-fashioned Wells to hoist up the water bucket.

在老式水井中用来提上水桶的装置就是这类机械的一个例子。

youdao