Ключевые слова: adjust, build, close up, concrete, construct, construction, construction vest, constructor, contractor, control, development, distribution, employee, employment, engineer, equipment, facility, factory, foreman, glove, hard hat, helmet, industrial, industry, job, labor, maintain, man, manufactory, manufacture, mechanic, multiethnic, multiracial, occupation, operate, outdoors, pipeline, plant, production, professional, service, supervisor, uniform, valve, work, worker, workman,