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汽车拖拉机用钢 | 2012-3-9 16:13:00

汽车拖拉机用钢

    汽车和拖拉机零件都承受动载荷。由于发动机功率的不断增大,热载荷增加,设计上要尽量降低单位功率的金属材料消耗量等。对不同零部件用钢有不同的性能要求。按其工艺特点和用途可大致分为:(1)渗碳钢,(2)调质钢,(3)高、中频感应加热淬水用钢,(4)弹簧钢,(5)冷冲压用钢,(6)冷镦、冷挤压用钢,(7)易切结构钢,(8)气阀用钢等。

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Re:在漫画中识别身边的违章 | 2016-10-23 15:42:21
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Re:在漫画中识别身边的违章 | 2016-10-22 19:22:41
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Re:在漫画中识别身边的违章 | 2016-10-22 13:24:47
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Re:在漫画中识别身边的违章 | 2016-10-22 2:39:14
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Re:在漫画中识别身边的违章 | 2016-10-21 12:17:42
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Re:在漫画中识别身边的违章 | 2016-10-20 7:27:06
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Re:在漫画中识别身边的违章 | 2016-10-16 6:31:54
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Re:在漫画中识别身边的违章 | 2016-10-11 3:34:02
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Re:在漫画中识别身边的违章 | 2016-10-8 14:38:38
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原创 | 2016-9-30 15:52:09
原创(游客)http://rywywj.lofter.com/post/1e6a80c3_c822a3c http://rywkdks.lofter.com/post/1e698063_c7f62d0 http://rywydx.lofter.com/post/1e6a68e3_c80f7d0 http://rywydx.lofter.com/post/1e6a68e3_c80c92b http://rywkdks.lofter.com/post/1e698063_c7f6a72 http://rywkdks.lofter.com/post/1e698063_c7f52f8 http://njryw168.lofter.com/post/1e6983e5_c7ee9a0 http://rywkdks.lofter.com/post/1e698063_c7f730e http://rywywj.lofter.com/post/1e6a80c3_c820a3a http://njryw168.lofter.com/post/1e6983e5_c7ee0fa
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原创 | 2016-9-28 21:09:13
原创(游客)http://wztgywj.lofter.com/post/1e65f473_c6eea38 http://ywjseo.lofter.com/post/1e634752_c650dce http://bjseoywj.lofter.com/post/1e66bf3e_c707442 http://bjseoywj.lofter.com/post/1e66bf3e_c70f49a http://ywjseo.lofter.com/post/1e634752_c64ffed http://ywjseo.lofter.com/post/1e634752_c650dd9 http://bjseoywj.lofter.com/post/1e66bf3e_c7116bc http://ywjseo.lofter.com/post/1e634752_c652de6 http://ywjseo.lofter.com/post/1e634752_c651a5e http://wztgywj.lofter.com/post/1e65f473_c6ee03c
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原创 | 2016-9-6 21:34:52
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