cctv的相關文章
cctv的相關商品
Closed-circuit television - Wikipedia, the free encyclopedia
瀏覽:1318
日期:2024-07-08
Closed-circuit television (CCTV) is the use of video cameras to transmit a signal to a specific place, on a limited set of monitors. It differs from broadcast television in that the signal is not openly transmitted, though it may employ point to point (P2...看更多