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Lego Modular Buildings (stylized as LEGO Modular Buildings) is a series of Lego building toy sets introduced in 2007, with new sets usually being released annually. Created in response to feedback and suggestions from the Adult Fans of Lego bricks (AFOL) and Teen Fans of Lego (TFOL) communities, the sets in this series are generally intended for more advanced builders.
During the Han dynasty (202 BC – 220 AD), most, if not all, iron smelted in the blast furnace was remelted in a cupola furnace; it was designed so that a cold blast injected at the bottom traveled through tuyere pipes across the top where the charge (i.e. of charcoal and scrap or pig iron) was dumped, the air becoming a hot blast before ...
Pig iron is known as 'raw iron', while wrought iron is known as 'cooked iron'. By the 1st century BC, Chinese metallurgists had found that wrought iron and cast iron could be melted together to yield an alloy of intermediate carbon content, that is, steel. [40] [41] [42]
Carabane, also known as Karabane, is an island and a village located in the extreme south-west of Senegal, in the mouth of the Casamance River.This relatively recent geological formation consists of a shoal and alluvium to which soil is added by accumulation in the branches and roots of the mangrove trees which cover most of the island.
Part of the Linha Norte system of the national railway, the wrought iron, double-hinged, crescent arch spans 353 m (1,158 ft), 60 m (200 ft) over the Douro River. At the time of its construction, it was the longest single-arch span in the world; today, it is no longer used for rail transport and was replaced by a modern structure in 1991.
By 1776, up to 80 iron furnaces throughout the American colonies were producing about as much iron as Britain itself. If one estimate of 30,000 tons of iron each year is accurate, then the newly formed United States was the world's third-largest iron producer, after Sweden and Russia. Notable pre-19th-century iron furnaces in the US
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