three-d migration in two steps
一步法三维偏移 three-D migration in one step 二步法三维偏移 three-D migration in two steps 带切线直管段的三倍直径弯头 three-diameter ells with tangents ..
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本文讨论了倾斜平界面的表现形态和法向深度剖面的三维偏移归位公式，同时研究了二步法三维偏移。
This paper discusses the appearance of dipping plane interface and the formula of 3d migration for normal depth section and 3d migration in two steps.
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