First rectangular tunnel-boring machine

Follow us on YouTube: https://str.sg/ytsub A new rectangular tunnel-boring machine makes it quicker, cleaner and less disruptive, to build underground tunnels. http://str.sg/4UgE Turn on notifications 🔔 to stay updated -------------------- WEBSITE ➤ http://www.straitstimes.com FACEBOOK ➤   / thestraitstimes   TIKTOK ➤   / straitstimes   INSTAGRAM ➤   / straits_times   TWITTER ➤   / straits_times   TELEGRAM ➤ https://t.me/TheStraitsTimes PODCASTS ➤ http://str.sg/stpodcasts VIDEO: CHINA RAILWAY ENGINEERING EQUIPMENT GROUP