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中图分类法:
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TN11 版次： |
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著者:
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Beck, A. H. W. |
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题名:
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Thermionic valves : [ their theory and design /] / , |
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载体形态:
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590 pages ; 22 cm |
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主题词:
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Vacuum-tubes. |
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索书号:
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1 |