这种井盖由井圈、井盖组成。

The well cover can circle the bolts to rotate.

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由井字型快速内环沟通了便捷的经六纬九主城道路交通体系。

The double cross shaped inner rings join with main streets to present a fast and convenient transport system.

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新鲜岩心由井中取出后立即密封以减小流体损失和暴露空气的时间。

A fresh core is sealed as soon as possible after retrieval from the well to minimize the loss of fluids and exposure to air.

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