sphere grinding wheel

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• Water wheel — This article is about the machine for converting energy of flowing or falling water. For paddle wheels used to propel watercraft, see paddle wheel ship. For wheels used solely to lift water, see Noria. For factories or industries driven by water… …   Wikipedia

• шарошлифовальный круг — Ндп. шарикошлифовальный круг Шлифовальный круг, предназначенный для шарошлифования. [ГОСТ 21445 84] Недопустимые, нерекомендуемые шарикошлифовальный круг Тематики обработка абразивная, абразивы EN sphere grinding wheel DE Kugelschleifscheibe …   Справочник технического переводчика

• History of the Cyclades — The Cyclades (Greek: Κυκλάδες / Kykládes ) are Greek islands located in the southern part of the Aegean Sea. The archipelago contains some 2,200 islands, islets and rocks; just 33 islands are inhabited. For the ancients, they formed a circle… …   Wikipedia

• Spirit rover — (MER A) Artist s concept of Rover on Mars Operator NASA Mission type Rover Launch date …   Wikipedia

• List of Chinese inventions — A bronze Chinese crossbow mechanism with a buttplate (the wooden components have …   Wikipedia

• Inventions in medieval Islam — A significant number of inventions were developed in the medieval Islamic world, a geopolitical region that has at various times extended from Al Andalus and Africa in the west to the Indian subcontinent and Malay Archipelago in the east.… …   Wikipedia

• technology, history of — Introduction       the development over time of systematic techniques for making and doing things. The term technology, a combination of the Greek technē, “art, craft,” with logos, “word, speech,” meant in Greece a discourse on the arts, both… …   Universalium

• military technology — Introduction       range of weapons, equipment, structures, and vehicles used specifically for the purpose of fighting. It includes the knowledge required to construct such technology, to employ it in combat, and to repair and replenish it.… …   Universalium

• Mesopotamia, history of — ▪ historical region, Asia Introduction  history of the region in southwestern Asia where the world s earliest civilization developed. The name comes from a Greek word meaning “between rivers,” referring to the land between the Tigris and… …   Universalium

• agriculture, origins of — Introduction  the active production of useful plants or animals in ecosystems that have been created by people. Agriculture has often been conceptualized narrowly, in terms of specific combinations of activities and organisms wet rice production… …   Universalium

• Europe, history of — Introduction       history of European peoples and cultures from prehistoric times to the present. Europe is a more ambiguous term than most geographic expressions. Its etymology is doubtful, as is the physical extent of the area it designates.… …   Universalium