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1·Space pre-tension structures under construction and pre-tensioning are usually with sophisticated behaviors and small stiffness.

预应力空间结构施工张拉过程受力复杂，刚度较小。

2·The contractor shall design a pre-stressing, post-tensioning system, capable of providing net cable forces as will be specified in the contract document.

承包方应当设计一个预加应力、后加拉力系统，以便可以如将要在合同文件中规定的那样为网线提供力量。