Search results
Results From The WOW.Com Content Network
They were called Hochbunker (literally, "high bunkers"; better translated as "above ground bunkers", to distinguish them from the usual deep i.e. underground air raid shelters) and those that functioned as anti-aircraft artillery platforms were also called Flak towers. Some were over six stories high; several survive to this day because of the ...
In the First World War the belligerents built underground shelters, called dugouts in English, while the Germans used the term Bunker. [ 5 ] [ 6 ] By the Second World War the term came to be used by the Germans to describe permanent structures both large ( blockhouses ), and small ( pillboxes ), and bombproof shelters both above ground (as in ...
An underground base is a subterranean facility used for military or scientific purposes. Examples are: Cheyenne Mountain Complex; Chiashan Air Force Base; Iranian underground missile bases; Raven Rock Mountain Complex; Zeljava Air Base; There may be more than 10,000 underground military facilities worldwide. [1]
For premium support please call: 800-290-4726 more ways to reach us
Underground construction has a number of unique risks and challenges but shares a lot with traditional construction and mining. Underground construction workers often work under reduced light condition, in dangerous spaces, and are at a high risk of exposure to contaminants, fire, and explosions.
For premium support please call: 800-290-4726 more ways to reach us
A second underground hangar was built in 1947 at Södertörn Wing (F 18). [10] After that plans were finalized for building underground hangars capable of surviving close hits by tactical nuclear weapons. This required that these new hangars be much deeper, with 25 to 30 meters of rock cover, and heavy-duty blast doors in concrete. [11]
Crystal City in Arlington County, Virginia, an underground city. An underground city is a series of linked subterranean spaces that may provide a defensive refuge; a place for living, working or shopping; a transit system; mausolea; wine or storage cellars; cisterns or drainage channels; or several of these. Underground cities may be currently ...