US PATENT SUBCLASS 165 / DIG 315
.~.~.~ Located at heat-exchange housing inlet

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

DIG 228  DD  WITH FAN OR PUMP {3}
DIG 302  DD  .~ Rotary gas pump {7}
DIG 314  DD  .~.~ Radial impeller {1}
DIG 315.~.~.~ Located at heat-exchange housing inlet