...通讯系统 Total Access Communication System ; TotalAccessCommunicationSystemACS 视频通讯系统 visual communication system ; video communications system 串行实时通讯系统 SERCOS ..
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Since the second half of the 19th century, poster art has established its superior position among visual communication system on the strength of its unique charm.
从19世纪下半叶以来，海报艺术就以它独特的魅力在视觉传达体系中确立了其崇高的地位。
However, this purely visual system was useless in bad weather, and, by the 1930s, radio communication was coming into use for ATC.
然而，这种纯粹的视觉系统在恶劣天气下毫无用处，到了20世纪30年代，无线电通信开始用于空中交通管制。
The main functions, construction and system bus in the building visual talk back communication system were analyzed.
分析了楼宇可视对讲通信系统的主要功能、结构和系统总线。
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