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Most chainsaw safety features are focused on the kickback problem, and seek to either avoid it (chain and bar design), or to reduce the risk of injury should it occur (chain brakes). In addition to the safety features built into the chainsaw, operators should also wear specific chainsaw safety clothing .
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Chainsaw engines are traditionally either a two-stroke single-cylinder gasoline (petrol) internal combustion engine (usually with a cylinder volume of 30 to 120 cm 3) or an electric motor driven by a battery or electric power cord. In a petrol chainsaw, fuel is generally supplied to the engine by a carburetor at the intake.
A water-based primer, used primarily on wood. A primer (/ ˈ p r aɪ m ər /) or undercoat is a preparatory coating put on materials before painting.Priming ensures better adhesion of paint to the surface, increases paint durability, and provides additional protection for the material being painted.
In modern firearm designs, a firing pin and primer are used to ignite the propellant in the cartridge which propels the bullet forward. The firing pin must travel a short distance, creating a short delay between the user pulling the trigger and the weapon firing, which generally decreases accuracy.
Another problem with the lamp was that fluorides used in the etching attacked the tungsten filament, [2] and that external etching of the globe bulb weakened it. The rough outside surface collected dust and dirt and was difficult to clean. The etched bulbs were brittle and would often break with ordinary handling. [7]
Most of the bulbs in circulation are reproductions of the wound filament bulbs made popular by Edison Electric Light Company at the turn of the 20th century. They are easily identified by the long and complicated windings of their internal filaments, and by the very warm-yellow glow of the light they produce (many of the bulbs emit light at a ...
In East and Southeast Asia incandescent bulbs are rare in buildings. Many countries are encouraging the phase-out of incandescent light bulbs and substitution with other types of energy-efficient lamps. In addition to general lighting, special fluorescent lights are often used in stage lighting for film and video production. They are cooler ...