Viettel showcases defence tech at DSA, NATSEC exhibitions in Malaysia stockbot 0 2 05.06 16:24 https://vietnamnews.vn/economy/1655058/viettel-showcases-defence-tech-… + 0 https://vietnamnews.vn/rss/economy.rss + 0 Viettel High Tech, a subsidiary of the Viettel Group, represents Viettel at one of the world's top five defence and security exhibitions.