单词 | electron tube |
例句 | Prosecutors said Mr. Ghahreman conspired to use a Dubai-based front company to help supply the Iranians, including with gyrocompasses used for swift boat navigation and electron tubes used for military airborne radar. Details of 7 Iranians Granted Clemency in Prisoner Swap 2016-01-17T05:00:00Z Then, too, the older electron tubes had not been entirely replaced. Where I Wasn't Going They stepped into a little cell, completely surrounded with mirrors and vast prisms and lenses and electron tubes. The Cosmic Express |
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