In order to change the situation a plan to develop square H. F. welded pipe used in container has been put forward.

为改变这一现状，国家提出国内焊管行业开发集装箱用方矩形高频焊接钢管的计划。

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The bored cast in place concrete piles embedded in rock were used in the main structure. The post grouting prestressed pipe piles adopted in the design were the f...

航站楼的主体结构采用嵌岩冲孔桩，设计中采用的后压浆预应力管桩是首次在岩溶地区应用。

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