| 976 / | HD | NUCLEAR TECHNOLOGY |
| DIG 341 | DD | TRANSPORTABLE OR PORTABLE SHIELDED CONTAINERS [G21F-5/00] {9} |
| DIG 348 | | .~ Specially adapted heat removal systems (e.g., by a circulating fluid or by cooling fins.); Specially adapted protection against external fire [G21F-5/00H] |