surface circumferential crack
surface circumferential crack
表面周向裂纹
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The wave propagation and power flow characteristics of a shell-type pipe with circumferential surface crack are investigated and the method for crack detection is proposed.
研究在外力激励下含有环向表面裂纹损伤的壳式管道的波传播与功率流特性，并给出裂纹识别方法。
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