裂缝诊断研究是近年来土木工程结构中一个重要的研究课题。
The structural crack diagnosis has been an important research subject in the field of civil engineering.
裂缝诊断的方法主要可分为：直接的远场裂缝诊断技术、直接的近井筒诊断技术、间接诊断方法。
Fracture diagnosing technique is mainly classified into: direct far field fracture diagnosing, direct near well bore fracture diagnosing and indirect fracture diagnosing.
用模拟试验研究各种脱粘和裂缝燃烧对发动机造成的故障效应，为故障诊断和失效分析提供依据。
The fault effects on restrict layer debonding and crack burning were studied by simulated test in order to provide analysis basis of fault diagnostics for solid rocket engine.
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