314 / | HD | ELECTRIC LAMP AND DISCHARGE DEVICES: CONSUMABLE ELECTRODES |
26 | WITH VENTILATOR, FUME FLOW SHIELD, FUME CONDENSER AND/OR TEMPERATURE MODIFYING MEANS {4} | |
27 | DF | .~> Movable type, connected to the electrode or electrode-moving mechanism |
28 | DF | .~> Ventilator, fume director and/or condenser |
29 | DF | .~> Liquid-circulating type |
30 | DF | .~> Radiating transmitter type |