US PATENT SUBCLASS 976 / DIG 134
.~ By displacement of the reflector or parts thereof [G21C-7/28]


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976 /   HD   NUCLEAR TECHNOLOGY

DIG 113  DD  CONTROL OF NUCLEAR REACTION [G21C-7/00] {9}
DIG 134.~ By displacement of the reflector or parts thereof [G21C-7/28]