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Definition of Fire tower stairway
1. Noun. In a high building, a stairway protected by several inches of concrete and entered through a kind of "air lock" that prevents the smoke to enter inside it. ¹
¹ Source: wiktionary.com
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1. Noun. In a high building, a stairway protected by several inches of concrete and entered through a kind of "air lock" that prevents the smoke to enter inside it. ¹
¹ Source: wiktionary.com