Those are limestones.

山上都是石灰岩。

youdao

There are four principal types of limestones.

石灰岩有四种主要类型。

youdao

There are four principal types of limestones.

剥离是车轮踏面失效的主要类型。

youdao

There are four principal types of limestones .

石灰岩有四种主要类型。

youdao

There are four principal types of limestones .

石灰岩有四种主要类型。

youdao