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USB 2.0 provides for a maximum cable length of 5 meters for devices running at Hi Speed (480 Mbit/s). The primary reason for this limit is the maximum allowed round-trip delay of about 1.5 μs. If USB host commands are unanswered by the USB device within the allowed time, the host considers the command lost. When adding USB device response time, delays from the maximum number of hubs added to the delays from connecting cables, the maximum acceptable delay per cable amounts to 26 ns.The USB 2.0 specification requires that cable delay be less than 5.2 ns per meter (192 000 km/s, which is close to the maximum achievable transmission speed for standard copper wire).
USB 2.0 Charger Data Cable, 2.0 USB Adapter, Micro USB 2.0 Cable, 2.0 USB Cable Ningbo Kabling Enterprise Limited , http://www.kablinglancable.com
Equipped with a nitrogen storage device and a corresponding injection device for special fire-fighting vehicles for special structures.
Nitrogen fire truck
Nitrogen fire vehicle