The analysis of the steel must be known because small percentages of certain elements, notably carbon, greatly affect the physical properties.
因为某些元素(尤其是碳)的微小百分比极大地影响物理性能，所以必须知道对钢的分析。
Spacewalking astronauts inspected the joint several times before and even collected samples of the steel grit for analysis back on Earth.
太空行走的宇航员以前对接头曾进行过几次检查，甚至收集了钢屑样品回地球分析。
In this paper, the study at home and abroad on the basis of the structure of the steel grid reliability analysis done some exploration, carried out mainly on the following aspects: 1.
本文在国内外有关研究的基础上，对钢网架结构的可靠性分析做了一些探索，主要展开了以下几个方面的工作：1。
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