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By the late 1970s, Rhodesia was producing an impressive array of military hardware, including automatic firearms, anti-personnel and anti-vehicle mines, bombs, mortars and a wide range of unique Mine and Ambush Protected (MAP) vehicles, which used commercial running gear to meet the specific requirements of the warfare being waged. [5]
In 1824, the Fort Pitt Foundry delivered 74 cast-iron 6-pounder guns out of an order of 100. [5] A second order of 100 cast-iron 6-pounders was delivered in 1828–1830 and at least 10 were rejected. Finally, 113 cast-iron 6-pounders were manufactured in 1836–1838 and 22 were rejected. No more orders were placed with the Fort Pitt Foundry.
The company also provided samples of ore, coal, pig iron and wrought iron, a smaller gun, a sugar cane mill, an olive mill and an elliptograph. [33] The Low Moor company bought the Bierley Ironworks in 1854. [34] By 1855 Low Moor was producing 21,840 tons of iron per year, and was the largest ironworks in Yorkshire.
Iron and coal mines surrounded the area. 160,000 Mausers were purchased by the Chinese military, along with mountain guns and small caliber versions. [4] Smokeless powder was produced for guns at a factory next to the arsenal. The arsenal itself built 40 Mausers a day, 6 field guns a month.
These mines were mainly of the underground shaft type, which were among the deepest iron mines in the country. Due to these characteristics, and the greater associated costs involved with extracting the ore, these mines were unable to compete economically with the larger open pit iron mines in northern Minnesota and elsewhere.
US iron ore made up 2.5 percent of the total mined worldwide in 2015. Employment as of 2014 was 5,750 in iron mines and iron ore treatment plants. [3] US iron ore mining is dominated by the Precambrian banded iron formation deposits around Lake Superior, in Minnesota and Michigan; such deposits were also formerly mined in Wisconsin. For the ...
Gilbert (pop. 1,799) is the location of Lake Ore-be-gone, an artificial lake created by flooding three open-pit iron ore mines. Hibbing (pop. 16,361) is the largest city by area in the state of Minnesota. It is home to the Hull–Rust–Mahoning Open Pit Iron Mine, one of the world's largest open pit iron mines.
For naval mines, the Huolongjing describes the use of slowly burning joss sticks that were disguised and timed to explode against enemy ships nearby: The sea-mine called the 'submarine dragon-king' is made of wrought iron, and carried on a (submerged) wooden board, [appropriately weighted with stones]. The (mine) is enclosed in an ox-bladder.