This paper introduced briefly developing trend of propylene rectification technology in gas separating unit and analyzed theoretically the middle reboiler used in propylene rectification column.
简述了气分装置丙烯精馏技术的发展趋势，对丙烯精馏塔增设中间重沸器进行了理论分析。
With further understanding of gas cap reservoir recovery mechanism and the progress in technology, obstruction recovery method has become an important method for developing gas cap field.
随着对气顶油田开采机理认识的深化和工艺技术的进步，目前隔障开采已成为气顶油田开发中重要方法之一。
This paper introduces the application cases of gas membrane separation technology in petrochemical industries emphatically and analyses the developing trend of gas membrane separation technology.
着重介绍了气体膜分离技术在石化工业上的应用实例，并分析了气体膜分离技术的开发趋势。
Because of superior performance of helical axial-flow multiphase pump, multiphase boost technology has taken the developing position for liquid-gas boosting technology recently.
多相混输技术是当今油气输送技术的发展趋势，而螺旋轴流式多相泵应用于油气水多相混输具有良好的性能。
Flow gas desulfurization technology by magnesium oxide and its present situation of application are introduced in this paper. And the developing prospect of this technology in China is also presented.
介绍了镁法脱硫技术及其应用现状，并对该技术在我国的发展前景进行了阐述。
The process technology, property, characteristic, developing data and process about PVC gas tube, produced by mixing PVC with NBR rubber are introduced.
介绍以聚氯乙烯与丁腈橡胶共混生产聚氯乙烯空气胶管的生产工艺流程、性能与特点、研制数据及研制过程。
The general developing situation of compressed natural gas (CNG) technology is introduced in this paper.
压缩天然气（CNG）是专用于汽车替代汽油的燃料。
So, reforming the smoke capture system and developing a high efficiency gas-collecting hood technology suitable to large-scale aluminum reduction cell become more and more particularly urgent.
因此，对现有集气系统进行改造，并研究开发一种适合大型铝电解槽的高效集气排烟技术就显得尤为迫切。
So, reforming the smoke capture system and developing a high efficiency gas-collecting hood technology suitable to large-scale aluminum reduction cell become more and more particularly urgent.
因此，对现有集气系统进行改造，并研究开发一种适合大型铝电解槽的高效集气排烟技术就显得尤为迫切。
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