计算机科学技术
RG-59同轴线规格
In an analog system, all cameras need to be wired directly back to a central recording system using analog cable (typically RG-59 or RG-6 coaxial).
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英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。