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Pork cycle. A schematic diagram of the pork cycle. In economics, the term pork cycle, hog cycle, or cattle cycle [1] describes the phenomenon of cyclical fluctuations of supply and prices in livestock markets. It was first observed in 1925 in pig markets in the US by Mordecai Ezekiel and in Europe in 1927 by the German scholar Arthur Hanau [ de].
The hydrogen cycle consists of hydrogen exchanges between biotic (living) and abiotic (non-living) sources and sinks of hydrogen-containing compounds. Hydrogen (H) is the most abundant element in the universe. [1] On Earth, common H-containing inorganic molecules include water (H 2 O), hydrogen gas (H 2 ), hydrogen sulfide (H 2 S), and ammonia ...
Hungary. Standard Hungarian Railways 2-6-2 of 324 class, introduced in 1909. The most numerous steam locomotive type used in Hungary was the MÁV class 324 [ hu] 2-6-2, built from 1909 onwards, which were still at work in the last days of steam. The Hungarian State Railways (MÁV) also ran three important classes of 2-6-2 tank engines.
The Nissan L series of automobile engines was produced from 1966 through 1986 in both inline-four and inline-six configurations ranging from 1.3 L to 2.8 L. It is a two-valves per cylinder SOHC non-crossflow engine, with an iron block and an aluminium head.
The first British examples of the 2-6-4T wheel arrangement were two locomotives built for the narrow-gauge Leek & Manifold Valley Light Railway in 1904. The first 4 ft in ( 1,435 mm) standard gauge examples were the class 1B of the Great Central Railway, built in 1914. [8] Richard Maunsell of the South Eastern and Chatham Railway (SECR ...
2-6-0. Under the Whyte notation for the classification of steam locomotives, 2-6-0 represents the wheel arrangement of two leading wheels on one axle, usually in a leading truck, six powered and coupled driving wheels on three axles and no trailing wheels. This arrangement is commonly called a Mogul. [1]
Extirpated. Synonyms. Euarctos americanus. The American black bear ( Ursus americanus ), also known as the black bear, is a species of medium-sized bear endemic to North America. It is the continent's smallest and most widely distributed bear species. It is an omnivore, with a diet varying greatly depending on season and location.
The European emission standards are vehicle emission standards for pollution from the use of new land surface vehicles sold in the European Union and European Economic Area member states and the United Kingdom, and ships in EU waters. [1] [2] The standards are defined in a series of European Union directives staging the progressive introduction ...