Workers make molds for reinforced concrete from reinforcing bars construction helmet worker. https://www.rawpixel.com/image/13930045/photo-image-person-clothing-manView licenseWorkers make molds for reinforced concrete from reinforcing bars construction hardhat helmet. https://www.rawpixel.com/image/13930033/photo-image-person-clothing-manView licenseWorkers make molds for reinforced concrete from reinforcing bars construction hardhat helmet. https://www.rawpixel.com/image/13930047/photo-image-person-clothing-manView license