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Hammer Mill At Dobřív
The water Hammer Mill (also Upper Hammer Mill, in Czech also ''Hořejší lub'') at Dobřív near Rokycany is a unique technical monument commemorating the 500-year-old tradition of iron processing in this region of the Czech Republic. Within the Czech Republic, it is considered the most important building of its kind. It is the first technical monument in the Plzeň Region, that was declared a national cultural monument in 2010. The monument is owned by Plzeň Region and administered by the Museum of West Bohemia in Plzeň. History The present brick building was constructed at the beginning of the 19th century in the place of older wooden hammer mills from 1658 and 1701. The rich machinery is dated back to the 19th century. Originally, the hammer mill was used to refine blast-furnace raw iron and to produce bar forgings. After the development of later steel industry technologies, the hammer mill changed over to production of heavy forged tools in the late 1860s. In the second ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dobřív
Dobřív is a municipality and village in Rokycany District in the Plzeň Region of the Czech Republic. It has about 1,300 inhabitants. The historic centre is well preserved and is protected by law as a village monument zone. Administrative parts The village of Pavlovsko is an administrative part of Dobřív. Geography Dobřív is located about southeast of Rokycany and east of Plzeň Plzeň (; German and English: Pilsen, in German ) is a city in the Czech Republic. About west of Prague in western Bohemia, it is the Statutory city (Czech Republic), fourth most populous city in the Czech Republic with about 169,000 inhabita .... It lies in the Brdy Highlands. The highest point is the hill Žďár at . The eastern part of the municipal territory belongs to the Brdy Protected Landscape Area and includes several other hills with an altitude of more than 600 m. The Klabava River flows through the municipality. History The first written mention of Dobřív is from 1325. Sig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electricity
Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations. Various common phenomena are related to electricity, including lightning, static electricity, electric heating, electric discharges and many others. The presence of an electric charge, which can be either positive or negative, produces an electric field. The movement of electric charges is an electric current and produces a magnetic field. When a charge is placed in a location with a non-zero electric field, a force will act on it. The magnitude of this force is given by Coulomb's law. If the charge moves, the electric field would be doing work on the electric charge. Thus we can speak of electric potential at a certain point in space, which is equal to the work done by an external agent in carrying a unit of p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metallurgy
Metallurgy is a domain of materials science and engineering that studies the physical and chemical behavior of metallic elements, their inter-metallic compounds, and their mixtures, which are known as alloys. Metallurgy encompasses both the science and the technology of metals; that is, the way in which science is applied to the production of metals, and the engineering of metal components used in products for both consumers and manufacturers. Metallurgy is distinct from the craft of metalworking. Metalworking relies on metallurgy in a similar manner to how medicine relies on medical science for technical advancement. A specialist practitioner of metallurgy is known as a metallurgist. The science of metallurgy is further subdivided into two broad categories: chemical metallurgy and physical metallurgy. Chemical metallurgy is chiefly concerned with the reduction and oxidation of metals, and the chemical performance of metals. Subjects of study in chemical metallurgy include mi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Handicraft
A handicraft, sometimes more precisely expressed as artisanal handicraft or handmade, is any of a wide variety of types of work where useful and decorative objects are made completely by one’s hand or by using only simple, non-automated related tools like scissors, carving implements, or hooks. It is a traditional main sector of craft making and applies to a wide range of creative and design activities that are related to making things with one's hands and skill, including work with textiles, moldable and rigid materials, paper, plant fibers,clay etc. One of the oldest handicraft is Dhokra; this is a sort of metal casting that has been used in India for over 4,000 years and is still used. In Iranian Baluchistan, women still make red ware hand-made pottery with dotted ornaments, much similar to the 5000-year-old pottery tradition of Kalpurgan, an archaeological site near the village. Usually, the term is applied to traditional techniques of creating items (whether for per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smelting
Smelting is a process of applying heat to ore, to extract a base metal. It is a form of extractive metallurgy. It is used to extract many metals from their ores, including silver, iron, copper, and other base metals. Smelting uses heat and a chemical reducing agent to decompose the ore, driving off other elements as gases or slag and leaving the metal base behind. The reducing agent is commonly a fossil fuel source of carbon, such as coke—or, in earlier times, charcoal. The oxygen in the ore binds to carbon at high temperatures due to the lower potential energy of the bonds in carbon dioxide (). Smelting most prominently takes place in a blast furnace to produce pig iron, which is converted into steel. The carbon source acts as a chemical reactant to remove oxygen from the ore, yielding the purified metal element as a product. The carbon source is oxidized in two stages. First, the carbon (C) combusts with oxygen (O2) in the air to produce carbon monoxide (CO). Second, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rosenberg Family
The House of Rosenberg ( cs, Rožmberkové, sg. ''z Rožmberka'') was a prominent Bohemian noble family that played an important role in Czech medieval history from the 13th century until 1611. Members of this family held posts at the Prague royal (and later imperial) court, and were viewed as very powerful lords of the Kingdom of Bohemia. This branch of the Vítkovci clan was initially founded by Vítek III, the son of Witiko of Prčice. History Around 1250, the Vítkovci clan settled at the Rožmberk Castle in the region of Český Krumlov, then about 1253 erected the Český Krumlov Castle. The Český Krumlov Castle thus became the residence of the Lords of Rosenbergs for the next three hundred years. It was the Rosenbergs who influenced the appearance of southern Bohemia to a great extent. The coat of arms and emblem of this family was represented by a red five-petalled rose on a silver field, which is still often seen in a considerable part of southern Bohemia. Pete ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brdy
Brdy is a range of hills in the Czech Republic, forming a long massif stretching for c. 60 km southwest from Prague. The northern section of the Brdy is called "Hřebeny" and features one narrow ridge (highest elevation Písek - 690 m). The main Brdy range starts south of the Litavka river gorge and consists of several major elevations connected into one plateau, the highest peaks among them being Tok (864 m), Praha (862 m) or Třemšín (827 m). Most of the Brdy is covered by forest, and it is one of the largest contiguously forested areas in the interior of the country. Large sections of the massif are designated as a restricted military area and closed to the public. The Brdy military area has been a source of controversy for several decades. Military area The restricted military area was established in 1925, shortly after creation of Czechoslovakia, to cater for the needs of Czechoslovakia's growing armed forces. It was expanded and used extensively by Third Reich military ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iron Ore
Iron ores are rocks and minerals from which metallic iron can be economically extracted. The ores are usually rich in iron oxides and vary in color from dark grey, bright yellow, or deep purple to rusty red. The iron is usually found in the form of magnetite (, 72.4% Fe), hematite (, 69.9% Fe), goethite (, 62.9% Fe), limonite (, 55% Fe) or siderite (, 48.2% Fe). Ores containing very high quantities of hematite or magnetite (greater than about 60% iron) are known as "natural ore" or "direct shipping ore", meaning they can be fed directly into iron-making blast furnaces. Iron ore is the raw material used to make pig iron, which is one of the main raw materials to make steel—98% of the mined iron ore is used to make steel. In 2011 the ''Financial Times'' quoted Christopher LaFemina, mining analyst at Barclays Capital, saying that iron ore is "more integral to the global economy than any other commodity, except perhaps oil". Sources Metallic iron is virtually unknown on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mining
Mining is the extraction of valuable minerals or other geological materials from the Earth, usually from an ore body, lode, vein, seam, reef, or placer deposit. The exploitation of these deposits for raw material is based on the economic viability of investing in the equipment, labor, and energy required to extract, refine and transport the materials found at the mine to manufacturers who can use the material. Ores recovered by mining include metals, coal, oil shale, gemstones, limestone, chalk, dimension stone, rock salt, potash, gravel, and clay. Mining is required to obtain most materials that cannot be grown through agricultural processes, or feasibly created artificially in a laboratory or factory. Mining in a wider sense includes extraction of any non-renewable resource such as petroleum, natural gas, or even water. Modern mining processes involve prospecting for ore bodies, analysis of the profit potential of a proposed mine, extraction of the desired materials, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plzeň
Plzeň (; German and English: Pilsen, in German ) is a city in the Czech Republic. About west of Prague in western Bohemia, it is the Statutory city (Czech Republic), fourth most populous city in the Czech Republic with about 169,000 inhabitants. The city is known worldwide for Pilsner beer, created by Bavarian brewer Josef Groll in the city in 1842. Administrative division Plzeň is divided into ten boroughs, which are further divided into 25 administrative parts (in brackets): *Plzeň 1-Bolevec (Bolevec and Severní Předměstí) *Plzeň 2-Slovany (Božkov, Černice (partly), Doudlevce (partly), Hradiště, Koterov, Lobzy (partly) and Východní Předměstí (partly)) *Plzeň 3-Bory (Doudlevce (partly), Jižní Předměstí, Litice (partly), Nová Hospoda, Radobyčice, Skvrňany, Valcha, Vnitřní Město and Východní Předměstí (partly)) *Plzeň 4-Doubravka (Bukovec, Červený Hrádek, Doubravka, Lobzy (partly), Újezd and Východní Předměstí (partly)) *Plzeň 5-K ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Czech Koruna
The koruna, or crown, (sign: Kč; code: CZK, cs, koruna česká) has been the currency of the Czech Republic since 1993. The koruna is one of the European Union's 9 currencies, and the Czech Republic is legally bound to adopt the euro currency in the future. The official name in Czech is (plural , though the zero-grade genitive plural form is used on banknotes and coins of value 5 Kč or higher). The ISO 4217 code is CZK and the local acronym is Kč, which is placed after the numeric value (e.g., "50 Kč") or sometimes before it (as is seen on the 10-koruna coin). One crown is made up of 100 '' hellers'' (abbreviated as "h", official name in Czech: singular: , nominative plural: , genitive plural: – used with numbers higher or equal to 5 – e.g. ), but hellers have now been withdrawn from circulation, and the smallest unit of physical currency is 1 Kč. History In 1892, the Austro-Hungarian crown replaced the florin, at the rate of one florin to two crow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nail (fastener)
In woodworking and construction, a nail is a small object made of metal (or wood, called a tree nail or "trunnel") which is used as a fastener, as a peg to hang something, or sometimes as a decoration. Generally, nails have a sharp point on one end and a flattened head on the other, but headless nails are available. Nails are made in a great variety of forms for specialized purposes. The most common is a ''wire nail''. Other types of nails include '' pins'', ''tacks'', ''brads'', ''spikes'', and '' cleats.'' Nails are typically driven into the workpiece by a hammer or nail gun. A nail holds materials together by friction in the axial direction and shear strength laterally. The point of the nail is also sometimes bent over or ''clinched'' after driving to prevent pulling out. History The history of the nail is divided roughly into three distinct periods: * Hand-wrought (forged) nail (pre-history until 19th century) * Cut nail (roughly 1800 to 1914) * Wire nail (roughly 1860 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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