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<正>PETROLEUM GEOLOGY1 Some Ideas on Subtle Traps by Zhu Xia6 Distribution and Exploration Program of Litho-stratigraphically Trapped Hydro-carbon Accumulation Zones in the Continental Basins of Eastern China by HuJianyi, Xu Shubao and Tong Xiaoguang22 Knowledge and Practice on Exploration for Subtle Hydrocarbon Pools by YangWanli

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