机械的修理

This class includes the repair and maintenance of industrial machinery and equipment like sharpening or installing commercial and industrial machinery blades and saws; the provision of welding (e.g. automotive, general) repair services; the repair of agricultural and other heavy and industrial machinery and equipment (e.g. forklifts and other materials handling equipment, machine tools, commercial refrigeration equipment, construction equipment and mining machinery), comprising machinery and equipment of division 28. This class includes: - repair and maintenance of non-automotive engines, e.g. ship or rail engines - repair and maintenance of pumps and related equipment - repair and maintenance of fluid power equipment - repair of valves - repair of gearing and driving elements - repair and maintenance of industrial process furnaces - repair and maintenance of materials handling equipment - repair and maintenance of commercial refrigeration equipment and air purifying equipment - repair and maintenance of commercial-type general-purpose machinery - repair of other power-driven hand-tools - repair and maintenance of metal cutting and metal forming machine tools and accessories - repair and maintenance of other machine tools - repair and maintenance of agricultural tractors - repair and maintenance of agricultural machinery and forestry and logging machinery - repair and maintenance of metallurgy machinery - repair and maintenance of mining, construction, and oil and gas field machinery - repair and maintenance of food, beverage, and tobacco processing machinery - repair and maintenance of textile apparel, and leather production machinery - repair and maintenance of papermaking machinery - repair and maintenance of other special-purpose machinery of division 28 - repair and maintenance of weighing equipment - repair and maintenance of vending machines - repair and maintenance of cash registers - repair and maintenance of photocopy machines - repair of calculators, electronic or not - repair of typewriters

This class excludes: - installation, repair and maintenance of furnaces and other heating equipment, see 4322 - installation, repair and maintenance of elevators and escalators, see 4329