overshots

Water from the hillside stream turns the overshot, which drives the heavy stones that grind the grain.

用法提示：overshot 在此作名词，指上击式水轮，即靠从上方落下的水流冲击而转动的轮子。

An overshot is more efficient than an undershot wheel because the water falls onto it from above.

用法提示：overshot 为名词，指上击式水轮，句中用它来对比另一种水轮。

In the nineteenth century, most overshots in this region were replaced by steam engines.

用法提示：overshots 是名词 overshot 的复数形式，泛指多台上击式水轮。