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Ruan Xiaoqin ;Zhao Bing(Shen Zhen University, Shen Zhen 518060 ) (Xian Petrolem Institute,Xian 710065 )  
This paper using analytic method formaulates an inversion algorithms for heteroge-neous media v(x, y, z) =∑x kyjand radial direction deepth γ0,
【CateGory Index】: P631.8
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