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Burned tungsten wire Engaging structures of tungsten oxide, vaporized and then condensed back onto the edge of a tungsten filament. X18,000 |
NOTICE
OF COPYRIGHT: |
 |
|
Dee
Breger |
|
Burned tungsten wire Engaging structures of tungsten oxide, vaporized and then condensed back onto the edge of a tungsten filament. X18,000 |
NOTICE
OF COPYRIGHT: |
|
|
Dee
Breger |