US PATENT SUBCLASS 976 / DIG 211
.~.~ Inspection of outer surfaces of vessels [G21C-17/00D1]


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976 /   HD   NUCLEAR TECHNOLOGY

DIG 207  DD  MONITORING; TESTING; MAINTAINING [G21C-17/00] {9}
DIG 210  DD  .~ Remote inspection of vessels (e.g., pressure vessels) [G21C-17/00D] {3}
DIG 211.~.~ Inspection of outer surfaces of vessels [G21C-17/00D1]