US PATENT SUBCLASS 165 / DIG 350
.~.~ Tubing removably coupled to inlet and outlet at tank wall

Current as of: June, 1999
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165 /   HD   HEAT EXCHANGE

DIG 342  DD  TANK WITH HEAT EXCHANGER {5}
DIG 348  DD  .~ Heat exchanger within tank {4}
DIG 350.~.~ Tubing removably coupled to inlet and outlet at tank wall