The process principle and mass transfer mechanism of membrane separation are studied. The technique present situation, operation characters, application and development are reviewed.
简要论述了液膜分离技术的过程原理、 传质机理，介绍了该技术的研究现状。操作特点及其应用与发展前景。
The article introduces the concept and characters of digital certificate, analyzes its principle of operation and its role, and expounds its important applications.
文章介绍了数字证书的概念及特点，分析了其工作原理和作用，并对其重要应用领域进行了探讨。
The paper introduces the structure, operation principle, characters and experimental results of the bag filter.
介绍袋式过滤器的结构、工作原理、特点和试验结果。
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