Kr is the abbreviation of Kanbara reactor. the KR method was first developed by Japan in 1965, and China WISCO introduced the KR desulfurization device from Japan in the 197s. Basic introduction Chinese name: Kr refractive index: (gas) 1.427 heat capacity: 2.786 j/(mol k) thermal conductivity: w/(m k) Basic introduction, element symbol, Internet name, measurement unit, phrase abbreviation, Pentax system, clothing brand, Korea Shipping Agency, Korea Corporation, tool angle, The abbreviation of Kanbara reactor (working principle of KR method) is briefly introduced. KR method was first developed by Japan in 1965, and China WISCO introduced KR desulfurization device from Japan in 197s. In this method, the cross-shaped stirring head, which is poured with refractory material and baked, is immersed in the molten pool of molten iron to a certain depth, and the vortex generated under the intense stirring action of a large stirrer makes calcium oxide or calcium carbide-based desulfurization powder fully contact and react with molten iron to achieve the purpose of desulfurization. Its advantages are superior dynamic conditions, less metal loss, favorable use of cheap desulfurizer such as CaO, stable desulfurization effect, high efficiency (desulfurization can reach ≤.5%), and low consumption of desulfurizer, which is suitable for steel mills with high requirements and large proportion of low-sulfur steel. The disadvantage is that the equipment is complex, the one-time investment is large, and the temperature drop of desulfurized iron is large. The abbreviation of Keyword Rank is KR (keyword optimization difficulty index). KR was invented by Xiao Jun, the author of Jinhua Keyword Tool, with a grade of -1. The larger the value, the more difficult it is to optimize. The algorithm mainly uses the number of the first page of Baidu results page and the number of keyword-related results, which is the most accurate keyword difficulty calculation method in SEO industry at present. Element symbol Kr English name: Krypton Chinese name: krypton refractive index: (gas) 1.427 heat capacity: j/(mol k) 2.786 thermal conductivity: w/(m k) 9.43 heat of fusion: (kj/mol) 1.638 heat of vaporization: (kj/mol) 9.29. .4 Relative atomic mass: 83.8 Common valence: electronegativity: Peripheral electronic configuration: 4s2 4p6 Extranuclear electronic configuration: 2,8,18, 8 isotopes and radiation: kr-78kr-79 [1.45d] kr-8kr-81 [21y] kr-82kr-83kr-83m [1.86h] * kr-84kr-85 [1.73y] kr-85m [4.48h]. Kr-89[3.15m] Kr-9 Electron affinity sum energy:-41kJ mol-1 First ionization energy: 135.8kJ mol-1 Second ionization energy: 2351kJ mol-1 Third ionization energy: 356kJ mol-1 Elemental density: .378 g/ Cm3 Elemental melting point: -157.2℃ Elemental boiling point: -153.4℃ Atomic radius: 1.3 angstrom Ion radius: angstrom * * * Valence radius: 1.12 angstrom Common compound: KrF2 Discovered by Ramsey, travers time: 1898 Location: British name origin: Greek: kryptos (invisible). Description of elements: Colorless, odorless and tasteless, rare gas with small quantity. Element source: Krypton forms one millionth of the atmosphere and is obtained in the production of liquid air. Element use: used for making lamps. Some are used as inert filling gas in incandescent lamps, and some are mixed with argon to fill fluorescent lamps. The most important use of krypton is to make flashlights on both sides of the airport runway. Internet name Korea (? ) Internet domain name: kr is the ISO standard used to define the geographical area code of the Republic of Korea. It is a subset of ISO 3166-2. Each code consists of ISO 3166-1 code for the Republic of Korea (KR) and a two-digit area code, which are connected by hyphens. This standard defines a special city, six wide-area cities and nine roads. The unit of measurement is thousand roentgens (kr = kilor &; ouml; Ntgen), the unit of radioactive exposure. 1KR=1 roentgen. Roentgen is defined as causing 1 electrostatic unit (3.3364×1? 1 coulombs) radiation intensity of positive and negative ions. Roentgen unit is not an international unit, but it is still commonly used in medicine and other aspects. The conversion with the international unit is 1 roentgen unit =2.58×1-4 coulombs/kg. The phrase abbreviation KR is the abbreviation of English phrase, which appeared in the first season of the TV series Knight Rider 28. KR is short for Knight Rider, which is knight rider. KR: keyword competition level, with a value of -1. The larger the value, the more difficult it is to optimize Pentax system K-r. It has an 11-point auto-focusing system and an in-camera focus indicator light, which is convenient for users to shoot in dim scenes. Thanks to the adoption of a new generation of image sensors and a greatly upgraded AF algorithm, the focusing speed and accuracy of K-R in contrast mode in live view shooting have been greatly enhanced. In terms of structure, although the camera has a large image sensor with a size of 23.6mm×15.8mm, it still maintains the compactness and lightness of the camera body, thanks to the compact and lightweight stainless steel frame, the miniaturized anti-shake structure of the camera body and the highly integrated packaging means of parts, which ensures that every part of the camera fully saves space. The new Pentax machine K-r has the SR(Shake Reduction) anti-shake system developed by Pentax, which can effectively compensate the bad influence on the picture caused by jitter, and can realize the compensation of the shutter speed up to the fourth speed. Even when shooting without flash in a dim environment, clear and unambiguous images can be obtained. In addition, K-r is the first Pentax digital monocular camera with IrSimple? The products of high-speed infrared data transmission system realize the rapid transmission of data and greatly improve the timeliness of images. In the use of batteries, AA batteries were also abolished, and D-LI19 was used instead. The body size was 125×97×68 and the weight was 598g g.. Compared with the previous generation K-x, the performance of Pentax K-r has been comprehensively improved. A new generation of image sensors and greatly upgraded AF algorithm have made great progress in image quality and focusing accuracy of K-R. The introduction of black, red and white versions of the fuselage also allows K-r to adapt to the needs of more users. The clothing brand Karorinlan, with Chinese name "Kalu Linlan" and trademark "KR", is a fashion business clothing brand originating from Europe. KR's excellent design teams in France and Hong Kong integrate eastern and western cultures and persist in innovation, aiming at creating "elegant and concise luxury, pursuing the ultimate brand and enviable texture". KR represents a successful example of professional women who are elegant, confident, thoughtful but not calculating, tasteful and more human. Korea Shipping Agency Korea Classification Society was established in 196, which is a non-profit corporation established to safeguard the safety of life and property at sea, protect the environment, and constantly improve related technologies in shipbuilding, shipping and ocean. As a full member of the International Association of Classification Societies (IACS), we provide quality services for ships and marine structures, and strive to ensure the safety of classified ships. Korea Classification Society now has more than 36 million tons and more than 2,37 classified ships, and has been authorized by 5 major shipping countries. In 1988, it became a full member of the International Association of Classification Societies (IACS). In 199, it was registered in the Class Treaty of the London Institute of Insurers (ICC) and became an international class enterprise. The company's headquarters office building and research institute are located in Daejeon Dade Research Park, with 15 branches in major domestic ports such as Busan and Ulsan, and overseas offices in 28 overseas regions such as London and Shanghai, which can provide quality technical services to customers all over the world anytime and anywhere. By developing inspection technology and key technologies, Korea Classification Society continuously improves its technical capabilities and provides customers with the highest technical services. By cultivating all employees' adaptability to the international environment, the PSC's delay rate is reduced, and the customer-oriented management mode is implemented. We will strive to provide customers with the highest quality technical services and strive to become a world-class classification society trusted by customers at home and abroad. Korea Corporation Korea Railway Construction Corporation was established in 24. On January 1st of the same year, the construction department of the Railway Department and the Korea High-speed Railway Construction Corporation were merged into a quasi-* * organ. Tool included angle kr-the included angle between the main cutting edge measured in the base plane and the assumed feed motion direction.