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| Subject | Russian | English |
| радиоакт. | фотоны низкой энергии | low energy photons (radiation) |
| радиоакт. | фотоны низкой энергии | low energy photon radiation |
| med.appl. | фотоны с относительно более низкими уровнями энергии | soft photons (The beam contains relatively more high-energy (hard) photons near the central axis and relatively more low-energy (soft) photons far from the central axis vlad-and-slav) |