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金属材料力学性能与热处理工艺知识
金属材料力学性能是指金属材料在外加载荷作用下或载荷与环境因素(温度、介质和加载速率)联合作用下表现出来的行为。 常见的金属力学性能下表所示: 金属力学性能 5、B点:出现缩颈现象,试样局部截面明显缩小试样承载能力降低,拉伸力达到最大值 ...
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今日热点
Russia releases US teacher
Bannon pleads guilty
Trump imposes 25% tariffs
Accuses ex-fiancé, associates
Religious groups sue admin
2 Americans injured in attack
Nevada worker gets bird flu
Powell on rate cuts
Trans troops ban enforced
2,400 JFK files discovered
NIH funding cuts blocked
Winter storm warning issued
Maui wildfire settlement
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'Serial swatter' sentenced
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Interim Kennedy Center lead
UKR gas facilities attacked
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Renamed as Fort Bragg
Trump signs executive order
Andy Barr eyes Senate seat
DOJ orders to drop charges
Trump pardons Blagojevich
Ethics watchdog reinstated
Canned tuna recalled
Criticizes Trump admin
6 Tennessee officers charged
To run for NM governor
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