grinding marks

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• Belt grinding — is a machining method to process metals and other materials, with the aid of coated abrasives. The basic difference between belt grinders and belt sanders is the material being machined. Sanding is the machining of wood, grinding is the common… …   Wikipedia

• The Forest of Nisene Marks State Park — Redwood trees in the Forest of Nisene Marks. The Forest of Nisene Marks is a State Park located in Aptos, California and contains over 40 miles (64 km) of hiking trails and fire roads through approximately 10,000 acres (40 km2) of… …   Wikipedia

• Ceramography — is the art and science of preparation, examination and evaluation of ceramic microstructures.[1] Ceramography can be thought of as the metallography of ceramics. The microstructure is the structure level of approximately 0.1 to 100 µm, between… …   Wikipedia

• Brushed metal — is metal that has been abraded ( brushed ), usually with a fine grit sandpaper. The brushing gives the metal a distinctive look, as it retains some but not all of its metallic lustre and is given a pattern of very fine lines. It can be compared… …   Wikipedia

• hand tool — any tool or implement designed for manual operation. * * * Introduction  any of the implements used by craftsmen in manual operations, such as chopping, chiseling, sawing, filing, or forging. Complementary tools, often needed as auxiliaries to… …   Universalium

• pottery — /pot euh ree/, n., pl. potteries. 1. ceramic ware, esp. earthenware and stoneware. 2. the art or business of a potter; ceramics. 3. a place where earthen pots or vessels are made. [1475 85; POTTER1 + Y3] * * * I One of the oldest and most… …   Universalium

• ARCHAEOLOGY — The term archaeology is derived from the Greek words archaios ( ancient ) and logos ( knowledge, discourse ) and was already used in ancient Greek literature in reference to the study of ancient times. In its modern sense it has come to mean the… …   Encyclopedia of Judaism

• Petrosomatoglyph — This footprint carved into the rock on Dunadd, in Argyll, is linked to the crowning of the Scots kings of Dál Riata. A petrosomatoglyph is an image of parts of a human or animal body incised in rock. Many were created by Celtic peoples, such as… …   Wikipedia

• Abrasive — An abrasive is a material, often a mineral, that is used to shape or finish a workpiece through rubbing which leads to part of the workpiece being worn away. While finishing a material often means polishing it to gain a smooth, reflective surface …   Wikipedia

• dinosaur — /duy neuh sawr /, n. 1. any chiefly terrestrial, herbivorous or carnivorous reptile of the extinct orders Saurischia and Ornithischia, from the Mesozoic Era, certain species of which are the largest known land animals. 2. something that is… …   Universalium

• machine tool — machine tooled, adj. a power operated machine, as a lathe, used for general cutting and shaping of metal and other substances. [1860 65] * * * Stationary, power driven machine used to cut, shape, or form materials such as metal and wood. Machine… …   Universalium