315 / | HD | ELECTRIC LAMP AND DISCHARGE DEVICES: SYSTEMS |
112 | WITH LOAD DEVICE TEMPERATURE MODIFIER {4} | |
113 | DF | .~> Plural load device systems {1} |
115 | DF | .~> Electric heater for the load device {1} |
117 | DF | .~> Automatic control of the temperature modifier |
118 | DF | .~> Load device circuit controlled by the temperature modifying medium |