33 Repair and installation of machinery and equipment

3311 Repair of fabricated metal products 3312 Repair of machinery 3313 Repair of electronic and optical equipment 3314 Repair of electrical equipment 3315 Repair and maintenance of ships and boats 3316 Repair and maintenance of aircraft and spacecraft 3317 Repair and maintenance of other transport equipment 3319 Repair of other equipment 3320 Installation of industrial machinery and equipment