hand furnace
71lead processing — Introduction preparation of the ore for use in various products. Lead (Pb) is one of the oldest metals known, being one of seven metals used in the ancient world (the others are gold, silver, copper, iron, tin, and mercury). Its low… …
72work, history of the organization of — Introduction history of the methods by which society structures the activities and labour necessary to its survival. work is essential in providing the basic physical needs of food, clothing, and shelter. But work involves more than the use …
73Mining in the Upper Harz — The headframe of the Emperor William Shaft in Clausthal is one of the oldest surviving winding towers in Germany …
74ГОСТ 23172-78: Котлы стационарные. Термины и определения — Терминология ГОСТ 23172 78: Котлы стационарные. Термины и определения оригинал документа: 47. Барабан стационарного котла Барабан D. Trommel E. Drum F. Reservoir Элемент стационарного котла, предназначенный для сбора и раздачи рабочей среды, для… …
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75List of heraldic charges — This article does not cover those charges which derive their shape in part from that of the field; see Ordinary (heraldry). Subordinary chargesA few simple charges are traditionally, and arbitrarily, classified among the subordinaries. (All other …
76Edmund Cobb — Pour les articles homonymes, voir Cobb. Edmund Cobb est un acteur américain né le 23 juin 1892 à Albuquerque, Nouveau Mexique (États Unis), décédé le 15 août 1974 à Woodland Hills (Los Angeles). Sommaire 1 …
77List of words having different meanings in British and American English: A–L — Differences between American and British English American English …
78History of science — History of science …
79Battle of Chancellorsville — Part of the American Civil War …
80Wrought iron — is commercially pure iron. In contrast to steel, it has a very low carbon content. It is a fibrous material due to the slag inclusions (a normal constituent). This is also what gives it a grain resembling wood, which is visible when it is etched… …
