| A - material processing equipment |
| B - equipment for production, transport and distribution of concrete, mortar and rendering mixes |
| C - lifting gear |
| D - equipment for earthmoving and soil compaction |
| E - road construction machinery |
| F - railway track construction equipment |
| G - floating equipment |
| H - tunnel and mining construction equipment |
| J - pile drivers and extractors, soil injection equipment |
| K - drilling equipment, diaphragm wall equipment |
| L - equipment for pipe jacking and pipeline construction |
| M - equipment and plants for decontamination and environment protection |
| P - transport vehicles |
| Q - air compressors, pneumatic tools |
| Q.0 - screw-type compressors, mobile |
| Q.1 - screw-type compressors, stationary |
| Q.1.0 - screw-type compressors with electric motor, dry-running type |
| Q.1.1 - screw-type compressors, stationary, with electric motor, oil-flooded |
| Q.1.10 - screw compressor, transportable, electric motor, transportable, 7-8 bars |
| Q.1.11 - screw-type compressor, transportable with electric motor, 10-13 bars |
| Q.1.12 - screw- type compressor, transportable, electric motor, 15-20 bars |
| Q.1.2 - screw-type compressors, stationary, with diesel engine, oil-flooded |
| Q.1.3 - containerized compressed-air stations |
| Q.2 - piston compressors |
| Q.3 - miscellaneous compressors |
| Q.4 - compressed-air reservoirs |
| Q.5 - accessories for compressed-air equipment |
| Q.6 - compressed-air tools and accessories |
| Q.7 - equipment for the machining of drilling tools |
| Q.8 - miscellaneous equipment, pneumatically operated |
| Q.9 - air locks and attachments for caisson operations |
| R - equipment for power generation, transformation and distribution |
| S - hydraulic cylinders and hydraulic units |
| T - centrifugal and piston pumps, pipelines |
| U - formwork and scaffolds |
| W - workshop machines and equipment |
| X - construction site accomodations, containers |
| Y - equipment for surveying, laboratory, office, communication, monitoring, kitchen |
