Ключевые слова: 1, background, badge, banner, business, card, celebration, congratulate, construction, country, day, design, employers, employment, engineer, fist, freedom, graphic, greeting, hand, happy, holiday, horizontal, industrial, industry, international, job, label, labor, labor day, labour, man, marketing, may, may day international workers day, national, occupation, organize, person, poster, protest, revolution, strong, vintage, work, worker, working,