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The testudo was a common formation in the Middle Ages, being used by Muhammad 's forces during the Siege of Ta'if in 630, [4] also by the Carolingian Frankish soldiers of Louis the Pious to advance on the walls of Barcelona during the siege of 800–801, by Vikings during the siege of Paris in 885–886, by East Frankish soldiers under king ...
Since at least the Roman Empire, fortifications, walls and barriers have been an important part of protecting sovereign territories and private property. Perimeter security is designed with the primary purpose to either keep intruders out or captives contained within the area the boundary surrounds. Both natural and manmade barriers can serve ...
IP65 touchscreen display IP65 LED lamp. The IP code or ingress protection code indicates how well a device is protected against water and dust. It is defined by the International Electrotechnical Commission (IEC) under the international standard IEC 60529 [1] which classifies and provides a guideline to the degree of protection provided by mechanical casings and electrical enclosures against ...
Rampart (fortification) The multiple ramparts of the British Camp hillfort in Herefordshire. In fortification architecture, a rampart is a length of embankment or wall forming part of the defensive boundary of a castle, hillfort, settlement or other fortified site. It is usually broad-topped and made of excavated earth and/or masonry. [1][2]
Hesco bastion. German base (Norwegian section) inside Camp Marmal near Mazar-i-Sharif, Afghanistan. Note the internal lines of gabions to reduce and compartmentalize mortar effects. The Concertainer, [1] known colloquially as the Hesco barrier[2] or Hesco bastion, [3] with HESCO being the brand name of the manufacturer, is a modern gabion ...
Firewalls are a portion of a building's passive fire protection systems. Firewalls can be used to separate-high value transformers at an electrical substation in the event of a mineral oil tank rupture and ignition. The firewall serves as a fire containment wall between one oil-filled transformer and other neighboring transformers, building ...
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