165 / | HD | HEAT EXCHANGE |
120 | DF | WITH IMPELLER OR CONVEYOR MOVING EXCHANGE MATERIAL {1} |
121 | DF | .~ Mechanical gas pump {1} |
122 | DF | .~.~ Heating or cooling means and gas pump in housing {2} |
124 | DF | .~.~.~ Verging gas flow {2} |
126 | .~.~.~.~ Single inlet, plural outlets {1} | |
127 | DF | .~.~.~.~.~> Gas pump for each outlet stream |