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Sprayers range in size from man-portable units (typically backpacks with spray guns) to trailed sprayers that are connected to a tractor, to self-propelled units similar to tractors with boom mounts of 4–30 feet (1.2–9.1 m) up to 60–151 feet (18–46 m) in length depending on engineering design for tractor and land size.
Depending on the sprayer, the nozzle may or may not be adjustable, so as to select between squirting a stream, aerosolizing a mist, or dispensing a spray. In a spray bottle, the dispensing is powered by the user's efforts, as opposed to the spray can, in which the user simply actuates a valve and product is dispensed under pressure.
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Portable blast systems use either a welded pressure vessel, to overcome nozzle backpressure, to store and transfer abrasive media into a connected blast hose from a higher pressure differential, or use a non-pressurized hopper, which utilizes a process called dual induction, which conveys abrasive media to a tandem blast nozzle using an air ...
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The following tubes were used in post-World War II walkie-talkies and pocket-sized portable radios. All have 1.25 volt DC filaments and directly heated cathodes. Some specify which end of the filament is to be powered by the positive side of the filament power supply (usually a battery).
The C5 is powered by a 12-volt lead–acid electric battery driving a motor with a continuous rating of 250 watts and a maximum speed of 4,100 revolutions per minute. It is coupled with a two-stage gear-drive that increases torque by a factor of 13, without which the motor would not be able to move the vehicle when a person is on board.
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