Ключевые слова: altruism, boost, bounty, care, charity, coal, concern, conveyor, crusher, deed, donate, dozer, drive, dumper, excavator, favor, goodwill, grader, hand, handout, haul, improve, industry, kindness, large, loader, mining, offer, pollution, present, promise, safety, scraper, service, smelter, support, tipper, token, truck, uplift,