An early diode valve vacuum tube
RMID:Image ID:AW731J
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Contributor:
sciencephotos / Alamy Stock PhotoImage ID:
AW731JFile size:
57.9 MB (2.6 MB Compressed download)Releases:
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3690 x 5482 px | 31.2 x 46.4 cm | 12.3 x 18.3 inches | 300dpiMore information:
An early diode valve vacuum tube