Ключевые слова: bolt, calculation, complex, complicate, conveyor, dirty, drying plant, dust, engineer, engineering, factory, gold, industry, iron, itchy, knot, knowledge, light, maintainace, metal, motor, new, nut, old, operator, paddy, plant, rice mill, ring, rotate, screw, silo, skill, steel, steel rails, strength, strong, structure, useable, useful, vintage, washer, worker,