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Corinthian bronze (gold, silver) Cunife (nickel, iron) Cupronickel (nickel) CuSil (silver) Cymbal alloys (tin) Devarda's alloy (aluminium, zinc) Hepatizon (gold, silver) Manganin (manganese, nickel) Melchior (nickel); high corrosion resistance, used in marine applications in condenser tubes.
Pont du Gard (1st century AD), over the Gardon in southern France, is one of the masterpieces of Roman technology. Ancient Roman technology is the collection of techniques, skills, methods, processes, and engineering practices which supported Roman civilization and made possible the expansion of the economy and military of ancient Rome (753 BC – 476 AD).
The Mary River Mine is an open pit iron ore mine on Inuit Owned Land (IOL) operated by the Baffinland Iron Mines Corporation (BIMC), in the Mary River area of the Qikiqtaaluk Region, on Baffin Island, Nunavut, [ 3 ]: 2 in the Canadian Arctic Archipelago. As of 2021, Mary River mine operation consists of an open-pit mine, two work camps for ...
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The Detroit Diesel Series 71 is a two-stroke diesel engine series, available in both inline and V configurations, manufactured by Detroit Diesel. The number 71 refers to the nominal displacement per cylinder in cubic inches, a rounding off of 70.93 cu in (1.2 L). Inline models included one, two, three, four and six cylinders, and the V-types ...
Schematic representation of the flow of nitrogen compounds through a land environment See also: Nitrogen cycle Nitrogen is the most common pure element in the earth, making up 78.1% of the volume of the atmosphere [ 8 ] (75.5% by mass), around 3.89 million gigatonnes ( 3.89 × 10 15 kg ).
A machine taper is a system for securing cutting tools or toolholders in the spindle of a machine tool or power tool. A male member of conical form (that is, with a taper) fits into the female socket, which has a matching taper of equal angle. Almost all machine tool spindles, and many power tool spindles, have a taper as their primary method ...
379 – Emperor Gratian elevates Flavius Theodosius at Sirmium to Augustus, and gives him authority over all the eastern provinces of the Roman Empire. [1]649 – Conquest of Kucha: The forces of Kucha surrender after a forty-day siege led by Tang dynasty general Ashina She'er, establishing Tang control over the northern Tarim Basin in Xinjiang.