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接缝或缺陷体系分别指两个或两个以上具有特征形态的,如放射状或聚敛状等的接缝或缺陷群。尽管与表面定向裂隙被认为是碎裂的主要因素，但两者的机械行为和碎裂主要是由相互交错的断裂群引起的
expl. joint or fault system

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