| 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 167 | DD | .~ Details (e.g., seals, supporting constructions, ventillating arrangements, tube joints with a vessel wall) [G21C-13/02] {7} |
| DIG 175 | DD | .~.~ Sealing plugs [G21C-13/06] {2} |
| DIG 176 | | .~.~.~ For tubes (e.g., standpipes; Locking-devices for the plugs included) [G21C-13/06B] {1} |
| DIG 177 | DD | .~.~.~.~> Seals for the plugs [G21C-13/06B2] |