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Crocus cloth is an abrasive sheet similar to sandpaper or emery cloth but covered with a layer of very fine loose iron oxide particles rather than with bound grains of abrasive. It is intended for final metal and gemstone finishing and is available in various grades (particle sizes).
Hessian was first exported from India in the early 19th century. [5] It was traditionally used as backing for linoleum, rugs, and carpet. [5]In Jamaica and certain parts of the Caribbean (where it is only known as Crocus), [14] many labourers who used to work on the plantations were not often given pleasant materials with which to make clothes.
Polishing is the process of creating a smooth and shiny surface by rubbing it or by applying a chemical treatment, leaving a clean surface with a significant specular ...
Crankshaft, pistons and connecting rods for a typical internal combustion engine Marine engine crankshafts from 1942. The crankshaft is located within the engine block and held in place via main bearings which allow the crankshaft to rotate within the block. [3] The up-down motion of each piston is transferred to the crankshaft via connecting ...
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A 1928 Chris-Craft Cadet; the company is known for runabouts with extensive brightwork. Bright brass cannon of HMS Bacchante.. Brightwork also known historically as "bright work" refers to the exposed and varnished wood or metal work of a boat. [1]
A crankpin or crank pin, also known as a rod bearing journal, [1] is a mechanical device in an engine which connects the crankshaft to the connecting rod for each cylinder. It has a cylindrical surface, to allow the crankpin to rotate relative to the "big end" of the connecting rod.
According to F. Lisheng and T. Qingjun, the hand-crank of the rotary quern was different from a crank, which was the combination of a hand-crank and a push-and-pull connecting rod by a hinge. [ 7 ] The Antikythera mechanism, dated to around 200 BC, [ 25 ] [ 26 ] used a crank as a part of its mechanism. [ 27 ]