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| мазер на аммиаке | |||
| молекулярный генератор на аммиаке | |||
| мазер на пучке молекул аммиака; аммиачный мазер | |||
| ammonia maser: 5 phrases in 3 subjects |
| Electronics | 1 |
| Makarov | 1 |
| Technology | 3 |
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