By pouring into the thoracic cavity
cement mortar pouring for reinforcement
cooling off through pouring into water
pouring into in the bladder
steel cofferdam with double wall pouring jacket
mortar wall of super depth
FROM SURFACE INTO UNDERGROUND
transforming opencast mining into underground mini
transition from open-cut into underground mining
continuous underground wall
continuous underground wall structure
preventing pervasion wall underground
Underground wall and steel tube bracing
underground water in coal underground water
high strength cold-formed thin-wall steel wall stu