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| rear arch (слоевой топки котла) | |||
| combustion arch (слоёвой топки) | |||
| combustion arch (слоевой топки); rear arch | |||
| задний свод: 13 phrases in 5 subjects |
| Anatomy | 1 |
| Gynecology | 1 |
| Medical | 3 |
| Technology | 2 |
| Thermal engineering | 6 |
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