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In 1935, the .303 O Mark 1 Observing round was introduced for use in machine guns. The bullet to this round was designed to break up with a puff of smoke on impact. The later Mark 6 and 7 incendiary rounds could also be used in this role. During World War I British factories alone produced 7,000,000,000 rounds of .303 ammunition.
Threaded rod in bar stock form is often called all-thread (ATR); other names include fully-threaded rod, redi-rod, continuously-threaded rod, and TFL rod. [3] Galvanized steel, [3] mild steel, stainless steel, nylon, brass, copper, aluminum, and titanium are all commonly used to make threaded rods. [4]
Copper is sometimes used in decorative art, both in its elemental metal form and in compounds as pigments. Copper compounds are used as bacteriostatic agents, fungicides, and wood preservatives. Copper is essential to all living organisms as a trace dietary mineral because it is a key constituent of the respiratory enzyme complex cytochrome c ...
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LME Copper futures prices are also a part of the S&P GSCI commodity index, which is a benchmark index widely followed in financial markets by traders and institutional investors. Its weighting in these commodity indices give LME Copper futures prices non-trivial influence on returns on a wide range of investment funds and portfolios. Conversely ...
Copper mining also produces gold and silver as byproducts. [2] Byproduct molybdenum from copper mining makes Arizona the nation's second-largest producer of that metal. Although copper mineralization was found by the earliest Spanish explorers of Arizona, the territory was remote, and copper could seldom be profitably mined and shipped.