December 19, 2022
8min0
WeChat video call 300 meters underground, supporting real-time communication in emergencies On December 15, the 4G industrial ring network that can be upgraded to 5G was officially launched in the smart mining area of Asia-Potash International Investment in Khammouane province, 350 km away from Vientiane, Laos’ national capital. A miner made the […]