The applications of impact-echo method on nondestructive testing for concrete structures are researched in this paper.
本文针对冲击回波法在混凝土无损检测中的应用展开研究。
The measuring results in field show that the impact-echo method is effective in measuring the depth of surface-opening crack.
现场测试表明，该方法对开口裂缝深度的测试是相当有效的。
The measuring results in field show that the impact-echo method is effective in measuring the depth of surface-opening crack.
现场测试表明，该方法对开口裂缝深度的测试是相当有效的。
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