The process for concentrating natural vitamin E in the dual-column continuous countercurrent supercritical extraction is studied.
探讨了双塔连续逆流操作的超临界萃取和浓缩天然维生素E的工艺路线。
Using dual column with flame ionization detector to determine total hydrocarbon and non-methane hydrocarbon in air.
采用双柱双氢焰离子化检测器测定空气中的总烃和非甲烷烃。
Trace amounts of molybdenum in water and soil extract samples were determined using a dual column on-line ion-exchange preconcentration FIA-ICP system.
本文采用双柱在线离子交换预浓缩FIA-ICP系统，建立了水及土壤浸出液中痕量钼的测定方法。
First, the main procedures and the distinctive features of the most-obtuse-angle (MOA) row or column pivot rules are introduced for achieving primal or dual feasibility in linear programming.
首先回顾了采用最钝角行、列主元规则求解线性规画问题的原始、对偶可行解的主要过程，阐述了其与众不同的特性。
The new version of the dual language "elite" to promote "excellent enterprises to promote", while increasing the special offer supermarket, exposure machine and so on the new column, hot and.
新版增设了双语言的《精英人物推介》《优秀企业推介》，同时增加特价超市，曝光台等等新的栏目，热点多多。
Comparing the characteristics of tray column with packed column, and combining the structured packing with dual flow plate, a new type compound tray was developed.
对比板式塔和填料塔的特点，将规整填料与穿流板有机组合，开发出新型的复合塔板。
As of March 30th, 2007, the column of "reissue and print" shall be added to the function list of the issuing system of import and export licenses for dual-use items and technologies.
自2007年3月30日起，两用物项和技术进出口许可证发证系统功能列表中增加“换证打印”栏。
As of March 30th, 2007, the column of "reissue and print" shall be added to the function list of the issuing system of import and export licenses for dual-use items and technologies.
自2007年3月30日起，两用物项和技术进出口许可证发证系统功能列表中增加“换证打印”栏。
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