445 | Garbage disposal plants, incinerators |
481 | Drilling equipment |
577 | Central heating systems w/radiators |
58 | Sanitary syst. w/discharges, accommodation drain systems |
581 | Sanitary supply systems |
61 | Steam machinery for propulsion |
64 | Boilers, steam, gas generators |
641 | Main boilers |
644 | Auxiliary boilers |
646 | Exhaust gas boilers |
703 | Fuel oil supply systems |
841 | Heating oil treatment systems |