US PATENT SUBCLASS 976 / DIG 322
.~.~ Semi-liquids, gels, pastes [G21F-1/02C]

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976 /   HD   NUCLEAR TECHNOLOGY

DIG 319  DD  SHIELDING CHARACTERIZED BY THE COMPOSITION OF THE MATERIALS [G21F-1/00] {2}
DIG 320  DD  .~ Selection of uniform shielding materials [G21F-1/02] {6}
DIG 322.~.~ Semi-liquids, gels, pastes [G21F-1/02C]