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Headway Group-main produces fiber optical cable, optical fiber cable, lifepo4 battery, ups battery, storage battery, ebikes battery

Talk about SD and HD project installation depends on the points

www.headwaybatteryandcable.comBeginning in 2009, the monitoring system into the fiber optical cable Wholesalers network digitization stage, D1 (72-480) is becoming the standard of IP video surveillance with SD (StandardDefinition, referred to as SD), that is the standard analytic argument, the next due to picture detail more pursuit, and therefore china optical fiber cable will produce HD (HighDefinition, HD), also known as high-resolution. Later, in order to comply with the digital television (HDTV), 16:9 wide screen display format, then jumped to 720p and 1080p HD HD Castles format.
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Building intercom system maintenance community peace program Brief Analysis

Building intercom system inside and outside ups battery of a high-rise residential condominium buildings, households control messaging, security doors and tenants to the buildings in the duty room in case of an emergency alarm equipment. Complete function, reliable performance, and its large capacity, attractive appearance, easy to install storage battery and the majority of users, has been widely used and also the safety of the living quarters.
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