So it is nessary and important to strengthen research of paleo-reservoir for exploration in Palaeozoic.
因此，加强古油藏的研究对于指导研究区下古油气勘探具有重要的现实意义。
Three dimensioned CAD design for drilling machinery is the nessary option to improve the designing level. it has a broad prospect.
要全面提高钻探机械设计水平，三维CAD技术是钻探机械设计的必然选择，其应用前景广阔。
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