The results of tomography demonstrate that 1. there is significant lateral inhomogeneity in wave velocity in the North China region;
层面成象的结果表明：1。华北地区的地震波速度存在明显的横向不均匀性。
The results of tomography demonstrate that 1. there is significant lateral inhomogeneity in wave velocity in the North China region;
层面成象的结果表明：1。华北地区的地震波速度存在明显的横向不均匀性。
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