| 1/00 | Equipment or apparatus for, or methods of, general hydraulic engineering |
| 1/02 | Equipment or apparatus for, or methods of, general hydraulic engineering Hydraulic models |
| 3/00 | Engineering work in connection with control or use of streams, rivers, coasts, or other marine sites (barrages or weirs E02B 7/00); Sealings or joints for engineering work in general |
| 3/02 | Engineering work in connection with control or use of streams, rivers, coasts, or other marine sites (barrages or weirs E02B 7/00); Sealings or joints for engineering work in general Stream regulation, e.g. breaking up subaqueous rock, cleaning the beds of waterways, directing the water flow (dredging or scraping devices E02F) |
| 3/04 | Engineering work in connection with control or use of streams, rivers, coasts, or other marine sites (barrages or weirs E02B 7/00); Sealings or joints for engineering work in general Structures or apparatus for, or methods of, protecting banks, coasts, or harbours (sealings or joints E02B 3/16) |
| 3/06 | Engineering work in connection with control or use of streams, rivers, coasts, or other marine sites (barrages or weirs E02B 7/00); Sealings or joints for engineering work in general Structures or apparatus for, or methods of, protecting banks, coasts, or harbours (sealings or joints E02B 3/16) Moles; Piers; Quays; Quay walls; Groynes; Breakwaters |
| 3/08 | Engineering work in connection with control or use of streams, rivers, coasts, or other marine sites (barrages or weirs E02B 7/00); Sealings or joints for engineering work in general Structures or apparatus for, or methods of, protecting banks, coasts, or harbours (sealings or joints E02B 3/16) Moles; Piers; Quays; Quay walls; Groynes; Breakwaters Structures of loose stones with or without piles (piles E02D 5/00) |
| 3/10 | Engineering work in connection with control or use of streams, rivers, coasts, or other marine sites (barrages or weirs E02B 7/00); Sealings or joints for engineering work in general Structures or apparatus for, or methods of, protecting banks, coasts, or harbours (sealings or joints E02B 3/16) Dams; Dykes; Sluice ways or other structures for dykes, dams, or the like (making embankments or dams in general E02D 17/18) |
| 3/12 | Engineering work in connection with control or use of streams, rivers, coasts, or other marine sites (barrages or weirs E02B 7/00); Sealings or joints for engineering work in general Structures or apparatus for, or methods of, protecting banks, coasts, or harbours (sealings or joints E02B 3/16) Revetment of banks, dams, watercourses, or the like (of slopes in general E02D 17/2) |
| 3/14 | Engineering work in connection with control or use of streams, rivers, coasts, or other marine sites (barrages or weirs E02B 7/00); Sealings or joints for engineering work in general Structures or apparatus for, or methods of, protecting banks, coasts, or harbours (sealings or joints E02B 3/16) Revetment of banks, dams, watercourses, or the like (of slopes in general E02D 17/2) Preformed blocks; Arrangements thereof |
| 3/16 | Engineering work in connection with control or use of streams, rivers, coasts, or other marine sites (barrages or weirs E02B 7/00); Sealings or joints for engineering work in general Sealings or joints (joints for foundation structures E02D 29/16; sealing joints not restricted to hydraulic engineering work E04B 1/68) |
| 3/18 | Engineering work in connection with control or use of streams, rivers, coasts, or other marine sites (barrages or weirs E02B 7/00); Sealings or joints for engineering work in general Reclamation of land from water (drainage of soil E02B 11/00) |
| 3/20 | Engineering work in connection with control or use of streams, rivers, coasts, or other marine sites (barrages or weirs E02B 7/00); Sealings or joints for engineering work in general Equipment for shipping on coasts, in harbours or on other fixed marine structures, e.g. bollards (tying-up, anchoring B63B 21/00, e.g. bollards for shipping B63B 21/06; buoys B63B 22/00) |
| 3/24 | Engineering work in connection with control or use of streams, rivers, coasts, or other marine sites (barrages or weirs E02B 7/00); Sealings or joints for engineering work in general Equipment for shipping on coasts, in harbours or on other fixed marine structures, e.g. bollards (tying-up, anchoring B63B 21/00, e.g. bollards for shipping B63B 21/06; buoys B63B 22/00) Mooring posts |
| 3/26 | Engineering work in connection with control or use of streams, rivers, coasts, or other marine sites (barrages or weirs E02B 7/00); Sealings or joints for engineering work in general Equipment for shipping on coasts, in harbours or on other fixed marine structures, e.g. bollards (tying-up, anchoring B63B 21/00, e.g. bollards for shipping B63B 21/06; buoys B63B 22/00) Fenders (fenders integral with waterborne vessels or specially adapted therefor B63B 59/02) |
| 3/28 | Engineering work in connection with control or use of streams, rivers, coasts, or other marine sites (barrages or weirs E02B 7/00); Sealings or joints for engineering work in general Equipment for shipping on coasts, in harbours or on other fixed marine structures, e.g. bollards (tying-up, anchoring B63B 21/00, e.g. bollards for shipping B63B 21/06; buoys B63B 22/00) Fender piles |
| 5/00 | Artificial water canals (for water-power plants E02B 9/02; irrigation of soil E02B 13/00) |
| 5/02 | Artificial water canals (for water-power plants E02B 9/02; irrigation of soil E02B 13/00) Making or lining canals |
| 5/04 | Artificial water canals (for water-power plants E02B 9/02; irrigation of soil E02B 13/00) Navigable canals |
| 5/06 | Artificial water canals (for water-power plants E02B 9/02; irrigation of soil E02B 13/00) Navigable canals Operating equipment in connection with canals (ship-lifting devices E02C) |