US PATENT SUBCLASS 165 / DIG 223
.~.~ Vapor tube enclosed by coolant confining shell

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

DIG 184  DD  INDIRECT-CONTACT CONDENSER {12}
DIG 217  DD  .~ Space for coolant surrounds space for vapor {4}
DIG 223.~.~ Vapor tube enclosed by coolant confining shell