portable abatis

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Timeline of Russian inventions and technology records — The Hall of Space Technology in the Tsiolkovsky State Museum of the History of Cosmonautics, Kaluga, Russia. The exhibition includes the models and replicas of the following Russian inventions: the first satellite, Sputnik 1 (a ball under the… … Wikipedia
Cheval de frise — at the Confederate Fort Mahone defenses at Siege of Petersburg The cheval de frise (plural: chevaux de frise) was a Medieval defensive obstacle consisting of a portable frame (sometimes just a simple log) covered with many long iron or wooden… … Wikipedia
Jersey barrier — 42 inch (110 cm) high version of the Jersey barrier for deflecting automobiles and semi trailer trucks. A Jersey barrier or Jersey wall is a modular concrete barrier employed to separate lanes of traffic. It is designed to both minimize… … Wikipedia

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