976 / | HD | NUCLEAR TECHNOLOGY |
DIG 355 | DD | SHIELDED CELLS OR ROOMS [G21F-7/00] {5} |
DIG 361 | DD | .~ Shielded glove-boxes [G21F-7/04] {5} |
DIG 362 | .~.~ Shielded passages through walls; Locks; Closing or transferring means between glove-boxes [G21F-7/04B] *** (in general DIG. 356) |