Ключевые слова: 1, 1st, banner, business, card, celebration, congratulate, construction, day, emblem, employers, employment, engineer, factory, freedom, greeting, hammer, happy, holiday, illustration, industrial, industry, international, job, labor, labour, marketing, may, mechanism, national, nationality, occupation, organize, patriot, patriotism, poster, revolution, ribbon, socialism, tool, victory, work, worker,