Guangzhou Huishida Electronics Co., Ltd.
Closed circuit television monitor.
Hefei Jinhailian Computer Company
Hard disk reversion card.
Beijing Sapac Technology Co., Ltd.
Digital hard disk monitoring system.
Chengdu Keli Electron Research Institute
Closed circuit TV matrix control system.
Beijing Antai Xinda Science & Technology Co., Ltd.
Light-operated digital video frequency alarm device.


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