Intercom system and a variety of weak category, installation, maintenance, systems engineering.
对讲系统及各种弱电类的，安装，维护系统工程。
IBM and memory product related proxy, software development, weak electricity systems engineering.
IBM及存储产品相关代理，软件开发，弱电系统工程。
IBM and memory product related proxy, software development, weak electricity systems engineering.
IBM及存储产品相关代理，软件开发，弱电系统工程。
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