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Armourstone is a generic term for broken stone with stone masses between 100 and 10,000 kilograms (220 and 22,050 lb) (very coarse aggregate) that is suitable for use in hydraulic engineering. Dimensions and characteristics for armourstone are laid down in European Standard EN13383. [1] In the United States, there are a number of different ...
Naval armor refers to the various protections schemes employed by warships. The first ironclad warship was created in 1859, and the pace of armour advancement accelerated quickly thereafter. The emergence of battleships around the turn of the 20th century saw ships become increasingly large and well armoured.
The added weight of the armor led to limited mobility and reliability problems and the vehicle was eventually removed from service. Nagman ( Nagmash Memugan – APC with additional protection) – M113 equipped with Toga armor suite, an open-topped hexagonal superstructure around the commander's hatch and armored shields on the sides of the ...
SG 510-4 (7.62×51mm NATO variant) SG 510-4 rifle chambered in 7.62×51mm NATO. The SG 510-4 chambered in 7.62×51mm NATO was adopted by Chile and Bolivia. Compared to the SG 510-1, the following main changes were applied: Lighter, shorter (505mm) barrel with 8 (early), or 16 (late) chamber flutes, 304.8mm (1 in 12 inch) twist rate.
The Sikorsky UH-60 Black Hawk is a four-blade, twin-engine, medium-lift utility military helicopter manufactured by Sikorsky Aircraft.Sikorsky submitted the S-70 design for the United States Army's Utility Tactical Transport Aircraft System (UTTAS) competition in 1972.