Yes, you may check-in for your United Airlines (UA) flight online starting 24 hours and ending 60 minutes before the scheduled departure time (depending on your departure city and destination) to receive a mobile boarding pass on your mobile device or a printable boarding pass.
TCL Corporation. For other uses, see TCL. TCL Corporation (TCLéå) is a Chinese multinational electronics company headquartered in Huizhou, Guangdong Province. It designs, develops, manufactures and sells products including television sets, mobile phones, air conditioners, washing machines, refrigerators and small electrical appliances.
In the context of a CCTV camera TVL (TV Lines) refers to the horizontal resolution (the maximum number of vertical lines the camera can resolve) of the CCTV camera. TV Lines are the standard measure of an analog TV's Resolution. Rather than represent discrete locations on a grid, as Pixels in a digital Frame do, TV Lines indicate the maximum number of identifiable changes that can be produced along a single (horizontal) Scanline of an analog TV.