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Trapdoor. A trapdoor to a bomb shelter from World War II. A trapdoor is a sliding or hinged door that is flush with the surface of a floor, ceiling, or roof. [1] It is traditionally small in size. [2] It was invented to facilitate the hoisting of grain up through mills, however, its list of uses has grown over time. [3]
The doors and windows that opened to nothing resulted from the 1906 earthquake and the severe damage that happened to the house. [18] [14] [4] The small steps were built because of Winchester's declining health. [10] The trap doors were constructed in a greenhouse room where excess water could run and be piped to an outdoor garden. [14]
Half-height platform edge doors, also known as automatic platform gates, are cheaper to install than full-height platform screen doors, which require more metallic framework for support. Some railway operators may therefore prefer such an option to improve safety at railway platforms and, at the same time, keep costs low and non-air-conditioned ...
Trap (plumbing) Water seal in drain pipe under a sink. Water enters at right, fills the trap, and continues left. Inverted siphoning occurs below the line "A". In plumbing, a trap is a U-shaped portion of pipe designed to trap liquid or gas to prevent unwanted flow; most notably sewer gases from entering buildings while allowing waste materials ...
History. Trap Door Theatre, founded by Beata Pilch and Sean Marlow, was incorporated in 1990 as a nomadic company touring theatre in Stockholm, Berlin, Zakopane, and Paris. In 1994, Trap Door brought its European tradition to the United States, creating a permanent home for the company in Chicago. [3]
This page was last edited on 15 November 2008, at 17:10 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike License 4.0; additional terms may apply.
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