Ключевые слова: african, angolan, black, boat, communication, computer, correct, coverall, earplugs, earprotection, ecr, electronic, engine, engineer, indoor, industry, machine, machinery, male, marine, mariner, maritime, mechanic, mechanism, nigerian, occupation, occupied, one, pc, people, person, profession, professional, radio, room, safety, serviceman, ship, shipping, technician, uniform, vessel, walkietalkie, work, worker, working, workshop,