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Invitation to China Public Security Expo in Shenzhen on 28-31 Oct.October 28, 2019Invitation to China Public Security Expo in Shenzhen on 28-31 Oct.DSPPA sincerely invites you to attend the 17th China Public Security Expo in Shenzhen Convention & Exhition Center on 28-31 Octobe...view
Characteristics and subsystem analysis of modern conference systemNovember 29, 2021The modern conference system is the intelligent multimedia central control conference system. A few microphones and two speakers can hold a conference. This is the conference mode that has been used f...view
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