China Innovation! Super Giant Tunnel Boring Machines In Action
224 بار بازدید -
5 سال پیش
-
China's Giant tunnel boring machines
China's Giant tunnel boring machines are used to excavate the ground using a circular cross section that drills through a variety of ground soil or rocky earth to produce subway tubes, tunnels for railways and many more.
5 سال پیش
در تاریخ 1398/04/19 منتشر شده
است.
224
بـار بازدید شده