422 / | HD | CHEMICAL APPARATUS AND PROCESS DISINFECTING, DEODORIZING, PRESERVING, OR STERILIZING |
105 | DF | CONTROL ELEMENT RESPONSIVE TO A SENSED OPERATING CONDITION {6} |
108 | DF | .~ Control element responds proportionally to a variable signal from a sensor {2} |
110 | DF | .~.~ Controls flow rate of a material to or from a contact zone {1} |
111 | .~.~.~ Material is an input to contact zone |