Ключевые слова: background, banner, business, card, celebration, concept, construction, day, design, employer, employment, engineer, event, freedom, greeting, happy, happy labor day, holiday, industrial, industry, international, job, label, labor, labor market, labour, labour day, man, may, national, occupation, patriotism, person, poster, red, revolution, screwdriver, sign, socialism, struggle, symbol, text, work, worker, workers day, workforce, working, wrench,