| 11. | In its center the roof's cupola is pierced by a single ventilation shaft.
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| 12. | The Auton Winslet then liquefies and escapes through a ventilation shaft.
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| 13. | :Our toilet has such a ventilation shaft with a fan, so it should work.
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| 14. | At least two cars were set on fire, and smoke billowed from ventilation shafts.
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| 15. | It was discovered by a routine patrol that spotted a ventilation shaft on Monday.
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| 16. | Air ventilation shafts leading into the bunkers were not sealed.
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| 17. | An additional ventilation shaft was drilled between 1885 and 1887.
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| 18. | Ventilation shafts are located at the base of each silo.
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| 19. | Most of Qazvin s ab anbars are only equipped with ventilation shafts or semi-windcatchers.
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| 20. | Their plan was to crawl down from the ventilation shafts and kill the terrorists.
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