| 976 / | HD | NUCLEAR TECHNOLOGY |
| DIG 37 | DD | REACTOR FUEL ELEMENTS AND THEIR ASSEMBLIES; SELECTION OF SUBSTANCES FOR USE AS REACTOR FUEL ELEMENTS [G21C-3/00] {5} |
| DIG 58 | DD | .~ Assemblies of number of fuel elements in the form of a rigid unit [G21C-3/30] {2} |
| DIG 59 | DD | .~.~ Bundles of parallel pin-, rod-, or tube-shaped fuel elements [G21C-3/32] {9} |
| DIG 71 | DD | .~.~.~ Spacer grids; other spacer devices [G21C-3/34] {6} |
| DIG 75 | | .~.~.~.~ Spacer grids wherein each cell has a polygonal (e.g., square cross section) ; cells formed of assembled metallic nonintersecting strips [G21C-3/34D] {1} |
| DIG 76 | DD | .~.~.~.~.~> Polygonal cells formed of intersecting strips [G21C-3/34D2] {1} |