Closed-circuit television (CCTV) could be the using video cameras to deliver a signal with a specific place, over a limited pair of monitors. It is different from broadcast television in this the signal just isn't openly transmitted, thoug…

In cable production process, we have to use some aids and materials production. Here, we first introduce some of these tools and materials. In the production of the project, the most important tool is Crimping Tool of course. Not only the …