Ключевые слова: alert, attention, box, build, construct, construction, contractor, crane, danger, development, digger, drill, drilling, engineer, equipment, excavation, excavator, hard, heavy, helmet, icon, industrial, industry, lifting, loader, machine, man, mandatory vector, plan, planning, platform, professional, project, protection, protective, safety, set, sign, silhouette, simple, site, symbol, vehicle, vest, warning, work, worker, workman,