... 有限表 finite table 有限差变过程 process of finite variation 有限长度串 finite length string ...
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Then the characteristics of frequency variation during the fatigue crack propagation process are simulated by three - dimensional dynamic finite element analysis.
并利用三维动态有限元模拟了点焊接头疲劳裂纹扩展过程中频率变化特性。
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