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阐述电视会议系统的组成及其涉及的基础技术，介绍现已开通使用的四川省电力工业局电视会议系统试点工程，为全局电视会议系统全面建设提供理论及实践准备。
Describes the composition of television conferencing systems and the basic technologies involved. Introduces the pilot project of the teleconferencing system of Sichuan Provincial Electric Power Industry Bureau, which is now in use, and provides theoretical and practical preparations for the overall construction of global video conferencing systems.