常规动校正使波形发生拉伸畸变，尤其是浅层更为严重。
The stretch distortion often present itself in wave form when conventional dynamic correction is used.
采用部分近偏移距道叠加，避免出现远道动校正拉伸畸变；
The stacking of some near-offset traces avoids NMO correction stretching distortion on far traces;
采用部分近偏移距道叠加，避免出现远道动校正拉伸畸变；
The stacking of some near-offset traces avoids NMO correction stretching distortion on far traces;
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