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_aDLC _cDLC _dBD-ChCU |
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_aZhigarev, A. _bUtkin, N. |
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_aElectron optics and electron-beam devices _bx |
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_aMoscow _bMir Pub. _c1975 |
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| 504 | _aIncludes | ||
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_aElectronics _bPhysics |
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