422 / | HD | CHEMICAL APPARATUS AND PROCESS DISINFECTING, DEODORIZING, PRESERVING, OR STERILIZING |
129 | DF | CHEMICAL REACTOR {28} |
168 | DF | .~ Waste gas purifier {5} |
173 | .~.~ With heat exchanger for reaction chamber or reactants located therein {2} | |
174 | DF | .~.~.~> Electrical type |
175 | DF | .~.~.~> Regenerative heat sink |