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natural aging
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natural aging
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natural aging
自然时效
通过把机械零件曝露于室外自然环境下,经过长时间风吹、日晒、雨淋和季节变化,给零件造成多次反复的温度应力过载,促使残余应力发生释放而使尺寸获得稳定的方法。是古老的时效方法。
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brown long-eared bat
brown-marbled grouper
Brown McCoy radical
Brown-McCoy radical
brownmillerite
Brown motion
brown paper nautilus
Brown-Peterson spectrum
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brown rust of rye
Brown-Shield-Zeller theorem
brown shrimp
Brown's lunar theory
Brown Sparrow in Wild Fields: A Ballad
brown spot needle blight
brown-striped mackerel scad
Brownsville Ecological Industrial Park
brown Swiss cattle
brown tide
Brown-Twiss interferometer
Brown University
Brown v.Board of Education of Topeka
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