|
Xiangfen County
Xiangfen County () is a county in the southwest of Shanxi Province, China. It was established in February 1954 from the merger of the former Xiangling County () and Fencheng County (). The county falls under the jurisdiction of the prefecture-level city of Linfen, and has an area of and has 442,614 inhabitants. Taosi archeological site is in Xiangfen County. Administrative divisions Xiangfen County has jurisdiction over seven towns and six townships. These towns and townships are then further divided into 6 neighborhood committees, and 348 village committees. The county's seven towns are , , , , , , and . The county's six townships are Taosi Township, , , , , and . Climate Economy The county has vast mineral deposits, including 2.8 billion tons of proven coal reserves, 371 million tons of gypsum, and 30 million tons of iron ore. Other mined resources include dolomite, gold, silver, and copper. The county's heavy industries produce a number of industrial resources, such as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Postal Code Of China
Postal codes in the China, People's Republic of China () are postal codes used by China Post for the delivery of letters and goods within mainland China. China Post uses a six-digit all-numerical system with four tiers: the first tier, composed of the first two digits, show the provinces of China, province, province-equivalent direct-controlled municipalities of China, municipality, or autonomous regions of China, autonomous region; the second tier, composed of the third digit, shows the postal zone within the province, municipality or autonomous region; the fourth digit serves as the third tier, which shows the postal office within prefectures of the People's Republic of China, prefectures or prefecture-level city, prefecture-level cities; the last two digits are the fourth tier, which indicates the specific mailing area for delivery. The range 000000–009999 was originally marked for Taiwan (The Republic of China) but is not used because it not under the control of the People' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gold
Gold is a chemical element with the symbol Au (from la, aurum) and atomic number 79. This makes it one of the higher atomic number elements that occur naturally. It is a bright, slightly orange-yellow, dense, soft, malleable, and ductile metal in a pure form. Chemically, gold is a transition metal and a group 11 element. It is one of the least reactive chemical elements and is solid under standard conditions. Gold often occurs in free elemental ( native state), as nuggets or grains, in rocks, veins, and alluvial deposits. It occurs in a solid solution series with the native element silver (as electrum), naturally alloyed with other metals like copper and palladium, and mineral inclusions such as within pyrite. Less commonly, it occurs in minerals as gold compounds, often with tellurium ( gold tellurides). Gold is resistant to most acids, though it does dissolve in aqua regia (a mixture of nitric acid and hydrochloric acid), forming a soluble tetrachloroaurate an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dingcun
Dingcun () is an old village located in Xincheng (), Xiangfen County, approximately 28 kilometers south of Linfen, in southern Shanxi Province, China. Site description Historical residential courtyards in Dingcun consist of a number of "foursquare" courtyards with buildings on the four directions including the main halls, the wing rooms along the east and west sides, the corridors and the entrance gateways. It has totally 40 complete sets of "four-square" courtyards 598.5 jian (Jian: the smallest unit of a building, approximately 15 square meters each) rooms and covers an area of 48000 square meters. History The earliest courtyards were built in the 21st year in the reign of the Wanli Emperor (1593) of the Ming dynasty and the latest ones were of early republican period. Generally speaking, the total structure can be divided into three sections, the north courtyards, the middle courtyards and the south courtyards. These three sections respectively consisted of buildings of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
G22 Qingdao–Lanzhou Expressway
The Qingdao–Lanzhou Expressway (), designated as G22 and commonly referred to as the Qinglan Expressway () is an expressway that connects the cities of Qingdao, Shandong, China, and Lanzhou, Gansu. It is in length. This expressway is sometimes called QingHong expressway (an example can be seen on a building at Handan North exit saying "QingHong expressway administration committee"). Some sources claim the "Hong" is referring to Khunjerab Pass (Hóngqílāfǔ shānkŏu), although the route west of Lanzhou is unknown. The route of G22 between S2201 Handan Ring Expressway and Liaocheng is not clear. The northern route via Guantao County is marked G22 west of Shandong Provincial Highway 260 (in Guanxian) and Shandong Provicinal Expressway S1 (Jinan-Liaocheng) east of this point. The southern route via Daming County is marked G22 east of Shandong Provincial Highway 324 (in Dong'e Dong'e County () falls under the jurisdiction of Liaocheng Prefecture-level city, in the Shandong ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
G5 Beijing–Kunming Expressway
The Beijing–Kunming Expressway (), designated as G5 and commonly referred to as the Jingkun Expressway () is an expressway that connects the cities of Beijing, and Kunming, in Yunnan province. It is in length. As of 2018, the expressway has been completed in its entirety. Route The Beijing–Kunming Expressway runs from Beijing, the capital of the People's Republic of China, to Kunming, in the Yunnan Province. It passes through the following major cities: * Beijing * Shijiazhuang, Hebei * Taiyuan, Shanxi * Xi'an, Shaanxi * Chengdu Chengdu (, ; simplified Chinese: 成都; pinyin: ''Chéngdū''; Sichuanese pronunciation: , Standard Chinese pronunciation: ), alternatively romanized as Chengtu, is a sub-provincial city which serves as the capital of the Chinese provi ..., Sichuan * Kunming, Yunnan Detailed itinerary References {{DEFAULTSORT:G5 Beijing-Kunming Expressway 05 Expressways in Hebei Expressways in Shanxi Expressways in Shaanx ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cast Iron
Cast iron is a class of iron– carbon alloys with a carbon content more than 2%. Its usefulness derives from its relatively low melting temperature. The alloy constituents affect its color when fractured: white cast iron has carbide impurities which allow cracks to pass straight through, grey cast iron has graphite flakes which deflect a passing crack and initiate countless new cracks as the material breaks, and ductile cast iron has spherical graphite "nodules" which stop the crack from further progressing. Carbon (C), ranging from 1.8 to 4 wt%, and silicon (Si), 1–3 wt%, are the main alloying elements of cast iron. Iron alloys with lower carbon content are known as steel. Cast iron tends to be brittle, except for malleable cast irons. With its relatively low melting point, good fluidity, castability, excellent machinability, resistance to deformation and wear resistance, cast irons have become an engineering material with a wide range of applications a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cement
A cement is a binder, a chemical substance used for construction that sets, hardens, and adheres to other materials to bind them together. Cement is seldom used on its own, but rather to bind sand and gravel ( aggregate) together. Cement mixed with fine aggregate produces mortar for masonry, or with sand and gravel, produces concrete. Concrete is the most widely used material in existence and is behind only water as the planet's most-consumed resource. Cements used in construction are usually inorganic, often lime or calcium silicate based, which can be characterized as hydraulic or the less common non-hydraulic, depending on the ability of the cement to set in the presence of water (see hydraulic and non-hydraulic lime plaster). Hydraulic cements (e.g., Portland cement) set and become adhesive through a chemical reaction between the dry ingredients and water. The chemical reaction results in mineral hydrates that are not very water-soluble and so are quite durable i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steel
Steel is an alloy made up of iron with added carbon to improve its strength and fracture resistance compared to other forms of iron. Many other elements may be present or added. Stainless steels that are corrosion- and oxidation-resistant typically need an additional 11% chromium. Because of its high tensile strength and low cost, steel is used in buildings, infrastructure, tools, ships, trains, cars, machines, electrical appliances, weapons, and rockets. Iron is the base metal of steel. Depending on the temperature, it can take two crystalline forms (allotropic forms): body-centred cubic and face-centred cubic. The interaction of the allotropes of iron with the alloying elements, primarily carbon, gives steel and cast iron their range of unique properties. In pure iron, the crystal structure has relatively little resistance to the iron atoms slipping past one another, and so pure iron is quite ductile, or soft and easily formed. In steel, small amounts of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chemical Industry
The chemical industry comprises the companies that produce industrial chemicals. Central to the modern world economy, it converts raw materials ( oil, natural gas, air, water, metals, and minerals) into more than 70,000 different products. The plastics industry contains some overlap, as some chemical companies produce plastics as well as chemicals. Various professionals are involved in the chemical industry including chemical engineers, chemists and lab technicians. History Although chemicals were made and used throughout history, the birth of the heavy chemical industry (production of chemicals in large quantities for a variety of uses) coincided with the beginnings of the Industrial Revolution. Industrial Revolution One of the first chemicals to be produced in large amounts through industrial processes was sulfuric acid. In 1736 pharmacist Joshua Ward developed a process for its production that involved heating saltpeter, allowing the sulfur to oxidize and combine with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coke (fuel)
Coke is a grey, hard, and porous coal-based fuel with a high carbon content and few impurities, made by heating coal or oil in the absence of air—a destructive distillation process. It is an important industrial product, used mainly in iron ore smelting, but also as a fuel in stoves and forges when air pollution is a concern. The unqualified term "coke" usually refers to the product derived from low-ash and low-sulphur bituminous coal by a process called coking. A similar product called petroleum coke, or pet coke, is obtained from crude oil in oil refineries. Coke may also be formed naturally by geologic processes.B. Kwiecińska and H. I. Petersen (2004): "Graphite, semi-graphite, natural coke, and natural char classification — ICCP system". ''International Journal of Coal Geology'', volume 57, issue 2, pages 99-116. History China Historical sources dating to the 4th century describe the production of coke in ancient China. The Chinese first used coke for heatin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
