Construction of piperoof grouting for tunnel construction.

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Size: 5472px × 3647px
Photo credit: © Oliver Förstner / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: boring, building, chamber, concrete, constructing, construction, dark, digging, dirt, drill, drilling, engineering, excavation, front, geology, grouting, machine, machinery, metro, mineral, mining, piperoof, power, securing, site, soil, subway, support, supporting, tunnel, tunneling, underground, working