In complicated fault areas, however, the effect of conventional time migration processing was poor, which was mainly caused by the big saltation of transverse velocities.
而在复杂断裂区。常规时间偏移处理效果往往不好，这主要是由横向速度突变引起。
Special engineering vehicle's structure is very complicated, and they distribute in wide areas, their fault diagnosis and maintenance are very difficult.
特种工程车辆由于其结构复杂，使用中分布广泛，其故障诊断与维护工作难度很大。
The seismic inversion and reservoir prediction in complex fault-block areas are hard to make due to complicated geologic conditions and poor quality of seismic data.
由于地质条件和资料品质的限制，复杂断块区的三维地震资料反演和储集层预测有较大的难度。
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