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Bristle blasting is a mechanical abrasion cleaning process that is performed on metallic surfaces by a brush-like rotary power tool. The tool consists of sharpened, high-carbon steel wire bristle tips that are designed with a forward-angle bend, i.e., the shank of the wire is bent in the direction of tool rotation.
Metal whiskers form in the presence of compressive stress. Germanium, zinc, cadmium, and even lead whiskers have been documented. [1] Many techniques are used to mitigate the problem, including changes to the annealing process (heating and cooling), the addition of elements like copper and nickel, and the inclusion of conformal coatings. [2]
Gunmetal ingot is a related alloy in which the zinc is replaced by 2% lead; this makes the alloy easier to cast but it has less strength. [2]Modified gunmetal contains lead in addition to the zinc; it is typically composed of 86% copper, 9.5% tin, 2.5% lead, and 2% zinc.
Ballistol as liquid and as aerosol. Ballistol (meaning 'Ballistic Oil') is a mineral oil-based chemical which advertises that it has many uses.It is manufactured and distributed by Ballistol GmbH in the Bavarian village of Aham and was originally intended for cleaning, lubricating, and protecting firearms.
The line of sucker rods is represented in this diagram by the solid black line in the center of the well. A sucker rod is a steel rod, typically between 7 and 9 metres (25 and 30 ft) in length, and threaded at both ends, used in the oil industry to join together the surface and downhole components of a reciprocating piston pump installed in an oil well.
There are three types of rosin: gum rosin (from pine tree oleoresin), wood rosin (obtained by extraction of tree stumps), and tall oil rosin (obtained from tall oil, a byproduct of kraft paper process). Gum rosin has a milder odor and lower tendency to crystallize from solutions than wood rosin, and is therefore preferred for flux applications.
The Vickers machine gun or Vickers gun is a water-cooled.303 British (7.7 mm) machine gun produced by Vickers Limited, originally for the British Army.The gun was operated by a three-man crew but typically required more men to move and operate it: one fired, one fed the ammunition, the others helped to carry the weapon, its ammunition, and spare parts. [18]
A lightning rod or lightning conductor (British English) is a metal rod mounted on a structure and intended to protect the structure from a lightning strike. If lightning hits the structure, it is most likely to strike the rod and be conducted to ground through a wire, rather than passing through the structure, where it could start a fire or ...