granular tungsten carbide

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Scheelite — Infobox mineral name = Scheelite category = boxwidth = boxbgcolor = caption = formula = Calcium tungstate CaWO4 molweight = color = Golden yellow, brownish green, brown, pinkish to reddish gray, colorless habit = Pseudo octahedra, massive,… … Wikipedia
Materials science — Simulation of the outside of the Space Shuttle as it heats up to over 1,500 °C (2,730 °F) during re entry into the Earth s atmosphere Materials science is an interdisciplinary field applying the properties of matter to various areas of… … Wikipedia
tunnels and underground excavations — ▪ engineering Introduction Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening … Universalium

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