It is reflected that there are higher background stress fields in the areas, mainly releasing stresses by small swarms, micro fracture and gas eruption.
反映了该地区应力场背景较高，主要以小震群、微破裂及汽爆等方式释放应力。
The microstructure characteristics, macro and micro fracture morphology of brittle broken embedded casting closure of T9815 turbines were investigated by means of metallographical examination and SEM.
借助光学显微镜、扫描电镜等手段，对用埋铸法生产的T9815气轮机组隔板断裂部位的金相组织特征，宏观和微观断口形貌等进行了研究。
With a recheck of the observing data of Wenchuan and some other earthquakes, also based on the concept of fracture mechanics, it is deemed that there exists a micro-fracture wave before earthquakes.
根据对包括汶川大地震等一些实测资料的分析，并借用断裂力学和断裂物理的概念，可以认为存在一种震前出现的“微破裂波”。
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