automatic collapsible revolving door

automatic collapsible revolving door: автоматически складывающаяся вращающаяся дверь

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Revolving door — A revolving door typically consists of three or four doors that hang on a center shaft and rotate around a vertical axis within a round enclosure. Revolving doors are energy efficient by eliminating drafts, thus reducing the heating or cooling… … Wikipedia
List of United States inventions — 1700s1731 Sextant * The sextant is an astronomical instrument that is used to determine latitude for navigation. It does this by measuring angular distances, like the altitude of the sun, moon and stars. The sextant was invented independently in… … Wikipedia
small arm — small armed, adj. Usually, small arms. a firearm designed to be held in one or both hands while being fired: in the U.S. the term is applied to weapons of a caliber of up to one in. (2.5 cm). [1680 90] * * * ▪ military technology Introduction… … Universalium
N-Strike — Nerf N Strike Type Toy gun Company Hasbro Country United States … Wikipedia
United States Border Patrol — For other uses of Border Patrol , see Border Patrol (disambiguation). United States Border Patrol Common name Border Patrol Abbreviation USBP … Wikipedia

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