Ключевые слова: chain, dirty, electric, electrical, electrician, electricity, engine, engineer, engineering, equipment, gear, greasy, hand, industrial, industry, inspection, job, liquid, lube, lubricant, lubricating, lubrication, machine, maintenance, manufacturing, mechanic, mechanical, mechanism, metal, motion, motor, oil, oiling, plant, pouring, power, repair, repairman, roll, roller, site, skill, tool, work, worker, yellow,