Ключевые слова: advice, brick, chainlink fence, color image, communication, concrete, construction, construction barrier, construction equipment, construction machinery, construction site, danger, do not enter sign, exclusion, fence, forbidden, hardhat, hazardous area sign, helmet, information medium, information sign, information symbol, instructions, machine, no people, orthographic symbol, outdoors, pallet, place of work, protective workwear, restricted area sign, safety, security, shed, sign, sports helmet, symbol, text, vertical, warning sign, warning symbol,