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The creation of sparks from metals is based on the pyrophoricity of small metal particles, and pyrophoric alloys are made for this purpose. [2] Practical applications include the sparking mechanisms in lighters and various toys, using ferrocerium; starting fires without matches, using a firesteel; the flintlock mechanism in firearms; and spark testing ferrous metals.
HASL or HAL (for hot air (solder) leveling) is a type of finish used on printed circuit boards (PCBs). The PCB is typically dipped into a bath of molten solder so that all exposed copper surfaces are covered by solder. Excess solder is removed by passing the PCB between hot air knives.
Electric matches before, during and after ignition. An electric match is a device that uses an externally applied electric current to ignite a combustible compound.. Electric matches use a bridgewire consisting of a heating element to ignite a pyrogen, which is a quantity of readily ignited pyrotechnic initiator composition.
Tales of Valor includes new units, additional maps, and further multiplayer modes, such as 'Stonewall', where the player commands a small number of troops against waves of increasingly difficult enemies, and a feature called "direct-fire", where the player 'Points and shoots' (seen in Soldiers: Heroes of WWII, Faces of War and Men of War).
In addition, many viable HCCI control strategies require thermal preheating of the fuel, which reduces the density and hence the mass of the air/fuel charge in the combustion chamber, reducing power. These factors make increasing the power in HCCI engines challenging. One technique is to use fuels with different autoignition properties. This ...
Company of Heroes: Opposing Fronts (abbreviated CoH:OF) is the stand alone expansion pack to Company of Heroes, a real-time strategy game for computers running the Windows operating system. Opposing Fronts was developed by Canadian-based RTS developer Relic Entertainment , and published by THQ in September 2007.
City of Heroes & City of Villains: Good Versus Evil Edition: This retail box included an installation DVD-ROM current to Issue 7, a two-sided map of Paragon City and the Rogue Isles, digital copies of issues 1 through 6 of Top Cow's CoH comic book, and a "Pocket D VIP Pass" that had the serial code for access to both games, a month of free game ...
Unlike ATEX which uses numbers to define the safety "Category" of equipment (namely 1, 2, and 3), the IEC continued to utilise the method used for defining the safe levels of intrinsic safety namely "a" for zone 0, "b" for zone 1 and "c" for zone 2 and apply this Equipment Level of Protection to all equipment for use in hazardous areas since ...