To predict roof falling AE field tests have been conducted and AE monitor holes are laid out based on the block analysis.
为了预报冒落事故，开展了声发射(AE)现场试验，并在块体分析的基础上布置了AE监测孔。
PTAE 4A AE monitor system was developed for monitoring the fatigue crack propagation on aircraft structure. And a study on its practical application was carried out.
为实现飞机结构的疲劳裂纹动态监控，研制了PTAE-4A机载声发射监测系统，并作了随机机载应用研究。
Roof falling and rib spalling occurred in any times. To predict roof falling, AE field tests have been conducted and AE monitor holes are laid out based on the block analysis.
为了预报冒落事故，开展了声发射（AE）现场试验，并在块体分析的基础上布置了AE监测孔。
Roof falling and rib spalling occurred in any times. To predict roof falling, AE field tests have been conducted and AE monitor holes are laid out based on the block analysis.
为了预报冒落事故，开展了声发射（AE）现场试验，并在块体分析的基础上布置了AE监测孔。
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