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当前学科:合成氨装置操作中级工
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金属材料在高于某一临界温度的条件下受到应力作用时,随着作用时间的增长,产生不可恢复的永久性变性,这种不断增长的塑性变形称为金属的()。
A . 蠕胀
B . 蠕变
C . 化学腐蚀
D . 应力腐蚀
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