普通碳素结构钢--qsf999的安全生产小屋

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普通碳素结构钢 | 2012-3-12 15:02:00

普通碳素结构钢

又称普通碳素钢。与优质碳素钢相比，对含碳量、性能范围以及磷、硫和其他残余元素含量的限制较宽。我国和某些国家根据交货的保证条件，把普通碳素钢分为三类：甲类钢（A类钢），只保证力学性能，不保证化学成分，乙类钢（B类钢），只保证化学成分，不保证力学性能；特类钢（C类钢），既保证化学成分，又保证力学性能。特类钢常用于制造较重要的结构件。

By:qsf999 | 阅读全文 | 回复(18) | 引用通告 | 编辑

Re:在漫画中识别身边的违章 | 2017-3-4 14:24:19

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Re:在漫画中识别身边的违章 | 2017-2-22 18:51:02

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Re:在漫画中识别身边的违章 | 2017-2-20 16:38:15

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Re:在漫画中识别身边的违章 | 2016-10-23 14:46:19

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Re:在漫画中识别身边的违章 | 2016-10-22 16:08:01

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Re:在漫画中识别身边的违章 | 2016-10-22 3:54:41

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Re:在漫画中识别身边的违章 | 2016-10-21 12:37:16

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Re:在漫画中识别身边的违章 | 2016-10-20 23:36:48

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Re:在漫画中识别身边的违章 | 2016-10-16 2:41:57

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Re:在漫画中识别身边的违章 | 2016-10-15 20:43:46

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Re:在漫画中识别身边的违章 | 2016-10-10 17:17:18

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Re:在漫画中识别身边的违章 | 2016-10-8 15:13:55

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Re:在漫画中识别身边的违章 | 2016-10-8 0:00:01

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原创 | 2016-9-30 15:52:07

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原创 | 2016-9-28 21:09:11

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原创 | 2016-9-6 21:34:50

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