US PATENT SUBCLASS 165 / DIG 138
.~ Partially rotable (e.g, rocking, pivoting, oscillation, tilting, etc.)


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165 /   HD   HEAT EXCHANGE

DIG 135  DD  MOVABLE HEAT EXCHANGER {4}
DIG 138.~ Partially rotable (e.g, rocking, pivoting, oscillation, tilting, etc.)