For cement production at first extract limestone and clay from pits.
The core comes up as these cylindrical tubes of limestone.
The coarse limestone walls gave the old building a sturdy appearance.
Towering limestone bluffs meet proud towns eager to share their heritage.
The top chamber has a pointed roof made of limestone blocks.
Mercury may occur in trace amounts in the limestone and other raw materials used in cement production.
汞可能以痕量形式存在于用于水泥生产的石灰和其他原材料中。
And it's different than this limestone, you can see that.
粉笔比起这石灰岩就有所不同。你可以看得出来。
It was formed as a limestone cave during the glacial period.
它是于冰河时期形成的石灰岩洞。
This area is famous for its dramatic limestone cliffs.
甲米地区最广为人知的是其巨型的石灰岩峭壁。
The commonly used fluxes are limestone and dolomite.
常用的熔剂有石灰石和白云石。
It runs between two layers of limestone.
它在两层石灰岩之间流动。
Byzantine period marble and limestone architectural fragments.
拜占庭时期的大理石和石灰石建筑碎片。
Natural erosion over centuries formed the deep chasm in the limestone rock.
经年累月的自然侵蚀在石灰岩上切出了一条深深的裂谷。