PLA "Crossing Obstacles-2018" land-based unmanned system competition starts today.https://t.co/SAmbbinNi9 pic.twitter.com/SkDWvEEuGJ— dafeng cao (@dafengcao) September 12, 2018
PLA "Crossing Obstacles-2018" land-based unmanned system competition starts today.https://t.co/SAmbbinNi9 pic.twitter.com/SkDWvEEuGJ