refining slag
71Heavy Industries Taxila — Infobox Company name=Heavy Industries Taxila logo= type=Heavy engineering and arms manufacturing foundation=September, 1971 location city=Taxila, Punjab location country=PAK num employees=4500 civilian 1950 military (2004)Heavy Industries Taxila… …
72Eben Smith — (December 17, 1832 1906) was a successful mine owner, smelting company executive, railroad executive and bank owner in Colorado in the late 19th century and early 1900s.Early lifeEben Smith was born in Erie, Pennsylvania, the son of William and… …
73Silver mining — refers to the resource extraction of the precious metal element silver by mining.History of silver miningSilver has been known since ancient times. It is mentioned in the Book of Genesis, and slag heaps found in Asia Minor and on the islands of… …
74El Boleo — was a Mexican copper mine located at the port city of Santa Rosalía, Baja California Sur. It was operated by a French company (Compagnie du Boleo) who had obtained control of the mine through an extensive concession and 50 year tax extemption… …
75Oregrounds iron — Statue of Louis de Geer (1587 1652) in Norrköping, Sweden. De Geer introduced the Walloon method to Sweden. Oregrounds iron was a grade of iron that was regarded as the best grade available in 18th century England. The term was derived from the… …
76Swarf — This article is about the manufacturing waste. For the English band, see Swarf (band). For the archaic term for waste oil or grease, see Swarfega. Various examples of swarf, including a block of compressed swarf Swarf, also known as turnings,… …
77Mineral industry of Africa — The mineral industry of Africa is one of the largest mineral industries in the world. Africa is the second biggest continent, with 30 million km² of land, which implies large quantities of resources. For many African countries, mineral… …
78Соединённые Штаты Америки — (United States of America), США (USA), гос во в Cев. Aмерике. Пл. 9363,2 тыс. км2. Hac. 242,1 млн. чел. (1987). Cтолица Bашингтон. B адм. отношении терр. США делится на 50 штатов и федеральный (столичный) округ Kолумбия. Oфиц. язык… …
79agricultural technology — Introduction application of techniques to control the growth and harvesting of animal and vegetable products. Soil preparation Mechanical processing of soil so that it is in the proper physical condition for planting is usually… …
80titanium processing — Introduction preparation of the ore for use in various products. Titanium (Ti) is a soft, ductile, silvery gray metal with a melting point of 1,675° C (3,047° F). Owing to the formation on its surface of an oxide film that is… …
