Answer | Crossword Clue |
---|---|
ARGON | Inert gas used in vacuum tubes |
NEON | Inert gas in vacuum tubes |
ARGON | Inert gas used in welding |
XENON | Inert gas used in lights |
XENON | Gas used in tubes |
XENON | Gas used in TV tubes |
ARGON | Gas used in light tubes |
ARGON | Gas used in light bulbs, radio tubes, etc. |