air defense officer speaking on telephone / speaker issuing alert warning / klaxon blaring / civilians running indoors, some with children /... - automatic door montage stock videos & royalty-free footage00:331962 MONTAGE Automatic system relaying the air attack warning message to points across the country and civilians running for shelter in a Cold War training exercise / United Kingdom
automatic doors sliding shut - automatic door montage stock videos & royalty-free footage00:09Automatic doors sliding shut
robots 'working' at a hotel reception, tokyo - automatic door montage stock videos & royalty-free footage00:17Robots 'working' at a hotel reception, TokyoRobot, Hotel, Hotel Reception