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A rotary valve is a device used to change the pitch of a brass instrument. Rotary valves are usually found on French horns, and sometimes on other brasses; European trumpet players tend to favor rotary valves, as do tuba players. American trumpets are almost always equipped with piston valves instead. Brass instruments

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Topics: Rotary Valve, Rotary Dial, Rotary Engine, Rotary International...

Rotary dialThe rotary dial is a device mounted on or in a telephone or switchboard that is designed to send interrupted electrical pulses, known as pulse dialing, corresponding to the number dialed. It was invented in 1888 by Almon Strowger. The dial is circular, ab	RotarySee: Rotary engine Rotary International Rotary milking shed rotary intersections.	Rotary engineAlternative meaning: Wankel engine The rotary engine was a common type of internal combustion aircraft engine in the early years of the 20th century. It was also used in a few motorcycles and cars. In concept, a rotary engine is simple. It is a standard O
Rotary InternationalRotary International is an organisation whose members comprise Rotary Clubs ( service clubs) located all over the world. The members of Rotary Clubs are known as Rotarians and are business and professional leaders who provide humanitarian service, encoura	Rotary printing pressA rotary printing press is a printing press in which the impressions are curved around a wheel so that the printing can be done on long continuous rolls of paper, cardboard, plastic, or a large number of other substrates. Today, there are three main types	Rotary encoderA rotary encoder also called a shaft encoder is a digital electronic device used to convert the angular position of a shaft or axle to a digital code. These devices are used in robotics, in computer input devices (such as optomechanical mice and trackball
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Rotary valve	Rotary converter

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