grinding rate
31technology, 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… …
32Honing (metalworking) — Honing is a manufacturing process that produces a precision surface on a workpiece by scrubbing an abrasive stone against it along a controlled path. Honing is primarily used to improve the geometric form of a surface, but may also improve… …
33military 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.… …
34Churchill Machine Tool Company — The Churchill Machine Tool Company Limited Type Machine Tool Manufacturer Industry Engineering Fate Taken over, liquidated …
35Flour — For other uses, see Flour (disambiguation). A paper sack of wheat flour, with a metal measuring scoop. Flour is a powder which is made from grinding cereal grains, other seeds or roots (like Cassava). It is the main ingredient of bread, which is… …
36Gunpowder — For other meanings, see gunpowder (disambiguation). Black powder for muzzleloading rifles and pistols in FFFG granulation size. Coin (diameter 24 mm) for comparison. Gunpowder, also known since in the late 19th century as black powder, was the… …
37Methamphetamine — Meth and Tik redirect here. For other uses, see Meth (disambiguation) and Tik (disambiguation). This article is about the psychostimulant drug, methamphetamine, in both racemic and dextrorotatory forms. For the CNS inactive OTC nasal decongestant …
38Milling cutter — Milling cutters are cutting tools typically used in milling machines or machining centres (and occasionally in other machine tools). They remove material by their movement within the machine (e.g., a ball nose mill) or directly from the cutter s… …
39Ohalo — is the common designation for the archaeological site Ohalo II, which is located near the Sea of Galilee in modern day Israel, and one of the best preserved hunter gatherer archaeological sites of the Last Glacial Maximum, having been radiocarbon …
40Mesopotamia, 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… …
