The testing methods and contents for a concrete structure factory building after a fire hazard are introduced, including concrete strength, steel strength, carbonation depth in concrete and so on.

通过某工程实例，介绍了对火灾后混凝土结构厂房进行检测的方法和内容，包括混凝土强度、钢筋强度、混凝土碳化深度等。

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The resulting steel appears to achieve a combination of strength and toughness that is comparable to that of modem steels that are very rich in alloy content and, therefore, very expensive.

产出的钢在强度和韧性方面的综合性能可与合金含量非常丰富的现代钢相媲美，因此价格非常昂贵。

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The resulting steel appears to achieve a combination of strength and toughness that is comparable to that of modern steels that are very rich in alloy content and, therefore, very expensive.

由此产生的钢似乎达到了强度和韧性的结合，这与合金含量非常高因而非常昂贵的现代钢相当。

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But the steel strength of the national unity government would help us face all those who are breaking the law, or those who are trying to take down democracy in Iraq, or those who are conspiring and trying to have coups or basically bring down the national unity government.

NPR: Maliki Assures Bush on Iraqi Force's Readiness

Aluminum is beginning to replace low-strength steel and how much more aluminum can be used in cars depends on auto engineers.

FORBES: Aluminum Usage In Cars To Grow -- Davenport & Co

The revelation in 2007 that there was no domestically-owned source of the high-strength steel used in armored vehicles and submarines also brought no policy changes.

FORBES: How The Pentagon's Policies Hurt U.S. Manufacturing