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| semi-fireproof conduit; slow-burning heavy timber conduit (с толщиной деревянных балок перекрытия не менее 15 см); slow-burning heavy timber structure (с толщиной деревянных балок перекрытия не менее 15 см) | |||
| полуогнестойкая постройка: 2 phrases in 1 subject |
| Construction | 2 |
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