安防监控技术学习
安防监控技术学习部分基础知识，掌握基础才干按部就班安防监控技术学习1-4.doc
包括多个文件，请自行下载检测！
(Learn some basic knowledge of security monitoring technology and master basic skills step by step
Security monitoring technology learning 1-4.doc
Including multiple files, please download and test by yourself!)
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