Therefore, it is necessary to analyze the variation of the dry or thaw circle around the pipeline for pipeline design, construction and management.
因此分析管道周围土壤干燥圈或融化圈变化对管道系统的设计、施工和管理是十分必要的。
The archaeologists said in the statement that radio-carbon dating put the construction of the circle of bluestones at between 2,400 B.C. and 2,200 B.C., a few centuries later than originally thought.
考古学家在一份声明中说，经放射性碳测年法鉴定，环形巨石阵应该建造于公元前2400年至公元前2200年之间，比之前的推测晚了几百年。
It is important and difficult for design and calculation of concrete buoyancy in construction of formwork lining trolley with full circle section.
在全圆断面模板衬砌台车的施工应用中，混凝土浮力的设计计算是重点和难点。
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