| 87149 | Railway locomotives, maintenance and repair of | |
| 88823 | Railway or tramway rolling stock (not self-propelled) manufacturing services | |
| 67390 | Railway passenger terminals, services of | |
| 67310 | Railway pushing or towing services | |
| 71332 | Railway rolling stock insurance policies, underwriting of | |
| 87149 | Railway rolling stock, maintenance and repair of | |
| 67390 | Railway tickets, sales of | |
| 67310 | Railway towing services | |
| 53212 | Railway track | |
| 53212 | Railway track control systems | |
| 54212 | Railway track control systems, general construction of | |
| 54212 | Railway track repair services | |
| 53212 | Railway track safety systems | |
| 54212 | Railway track safety systems, general construction of | |
| 65123 | Railway transport services of containerized freight by flat cars | |
| 65121 | Railway transport services of freight by refrigerator cars | |
| 65122 | Railway transport services of freight by tanker cars | |
| 65129 | Railway transport services of freight, other | |
| 65124 | Railway transport services of letters and parcels | |
| 64210 | Railway transport services of passengers, interurban | |
| 64111 | Railway transport services of passengers, urban and suburban | |
| 91134 | Railway transport, administrative services related to | |
| 67390 | Railway transport, supporting services n.e.c., for | |
| 89410 | Railway wagons, mechanical reduction of | |
| 53212 | Railways | |
| 83323 | Railways, corrosion control programmes for | |
| 83323 | Railways, electrical engineering design services for the construction of | |
| 83310 | Railways, electrical installation appraisal of | |
| 83310 | Railways, engineering advisory and pre-design services for the construction of | |
| 53212 | Railways, funicular | |
| 54212 | Railways, funicular, general construction of | |
| 54212 | Railways, general construction of | |
| 83323 | Railways, geotechnical engineering services for the construction of | |
| 83323 | Railways, groundwater assessment for the construction of | |
| 83323 | Railways, integrated engineering services for the construction of | |
| 83323 | Railways, mechanical engineering design services for the construction of | |
| 83310 | Railways, mechanical installation appraisal of | |
| 83323 | Railways, other engineering services for the construction of | |
| 96910 | Railways, preserved, operation of | |
| 83330 | Railways, project management services concerning the construction of | |