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Gloved hands holding metal hole saw for concrete with centered pilot drill bit, showing worn cutting teeth for masonry drilling.
A concrete drainage pipe discharges polluted liquid and raw sewage into a river, staining the wall. A stark image of water contamination and environmental pollution in Brazil.
A construction worker uses a level to smooth wet concrete, ensuring a flat surface for the building's foundation
Texture of a concrete Wall. floor or wall construction material. Beton brut floor or wall construction material
Old wall texture smeared engine oil cement dark black gray background abstract grey color design are light with white gradient background.

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