Drones are flying underground in Japan to inspect parts of the Tokyo Metro
Drones are flying underground in Japan to inspect parts of the Tokyo Metro’s sprawling subway tunnels that are difficult for people to see The remote-controlled 2.5 pound (1.15kg) drone is encased in a plastic sphere This 8.5-inch wide casing protects the machine from any potential damage Fitted with cameras it searches for signs of damage … Read more