Ключевые слова: brainstorming, business, businessman, concepts, customer, cycle, diagram, email, engineer, expertise, factory, felt tip pen, helmet, human hand, ideas, industrial, industry, isolated, isolated on white, male, manager, market, marketing, mask, men, occupation, pen, plan, planning, professional occupation, protection, safety, sketch, sketching, strategy, teaching, tracing, white, white background, whiteboard, worker, working, workshop, writing, yellow,