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trapdoor n. 地板門,活板門,活蓋 地板門,活板門,活蓋 Trapdoor \Trap"door`\, n.
1. (Arch.) A lifting or sliding door covering an opening in a roof or floor. [1913 Webster] 2. (Mining) A door in a level for regulating the ventilating current; -- called also {weather door}. --Raymond. [1913 Webster] {Trapdoor spider} (Zool.), any one of several species of large spiders which make a nest consisting of a vertical hole in the earth, lined with a hinged lid, like a trapdoor. Most of the species belong to the genus {Cteniza}, as the California species ({Cteniza Californica}). [1913 Webster]
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