445 / | HD | ELECTRIC LAMP OR SPACE DISCHARGE COMPONENT OR DEVICE MANUFACTURING |
1 | DF | PROCESS {13} |
23 | DF | .~ With assembly or disassembly {8} |
29 | DF | .~.~ Including electrode or getter mounting {4} |
33 | DF | .~.~.~ Plural electrode mounting {1} |
34 | .~.~.~.~ CRT grid or cathode gun |