| 976 / | HD | NUCLEAR TECHNOLOGY |
| DIG 166 | DD | PRESSURE VESSELS; CONTAINMENT VESSELS [G21C-13/00] *** (chemical or physical processes B01J-3/00; pressure vessels in general F16J-12/00) {3} |
| DIG 180 | DD | .~ Vessels characterized by the material; Selection of materials for pressure vessels [G21C-13/08] {2} |
| DIG 183 | DD | .~.~ Concrete vessels [G21C-13/08D] {1} |
| DIG 184 | DD | .~.~.~ Made of prestressed-concrete [G21C-13/08D2] {1} |
| DIG 185 | | .~.~.~.~ Particulars concerning pre-stressing devices (and cables) [G21C-13/08D2B] |