Central air conditioner, automatic fire alarm, closed circuit TV watching system, communication network, public broadcasting and cable TV are all available in the exhibition hall.
展览大厅配有中央空调、自动火警、闭路电视、通讯网络、广播和有线电视。
Through the principle analysis and the circuit com- parison, we have designed a better scheme of a closed electronic window trac- king system.
通过原理分析和电路比较，设计了性能较优的闭环波门跟踪系统方策应用于电视跟踪系统。
An analysis of the antenna and scattering theory is an important part in the electromagnetic problems, which describes the energy transformation from a closed circuit system to an open space system.
电磁问题中有很大一类是研究天线和散射理论，即由封闭电路系统向空间开放系统的能量转换。
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