314 / | HD | ELECTRIC LAMP AND DISCHARGE DEVICES: CONSUMABLE ELECTRODES |
10 | DF | WTH AUTOMATIC SHUNT AND/OR CUTOUT {2} |
17 | DF | .~ Switch-operated type {1} |
18 | .~.~ Current- and/or potential-actuated switch {1} | |
19 | DF | .~.~.~> Feed-regulating mechanism, switch-actuated type |