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| X ray; X ray A penetrating electromagnetic radiation, usually generated by accelerating electrons to high velocity and suddenly stopping them by collision with a solid body, or by inner-shell transitions of atoms with atomic number greater than 10; their wavelength ranges from about 10(-5) angstrom to 10 angstroms, the average wavelength used in research being 1 angstrom | |||
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rontgensade : 1 短语, 1 学科 |
| 电子产品 | 1 |