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A trailing edge tone occurs when an exterior flow passes over a trailing edge. There is a whistle that is a combination of an edge tone and a trailing-edge tone and might be called a wake-edge tone. It occurs in rotating circular saws under idling conditions and may be called the circular-saw whistle. Under load conditions, blade vibration ...
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A pair of officials at a Maryland high school football game in September 2008. White knickers used to be worn by officials; black trousers are now standard.. For ease of recognition, officials are usually clad in a black-and-white vertically striped shirt and black trousers with a thin white stripe down the side (this was formerly white knickers with black/white striped stirrup stockings or ...
The 1950s and 60s marked growing demand for Hudson sports whistles (Olympics and other sport events on five continents). In 1957 A. R. Topman became an assistant general manager, and about 40 years later his son, Simon Topman, became the owner and the managing director of the company, starting the fourth period of company developments.
A party whistle A metal pea whistle. A whistle is a musical instrument which produces sound from a stream of gas, most commonly air. It may be mouth-operated, or powered by air pressure, steam, or other means. Whistles vary in size from a small slide whistle or nose flute type to a large multi-piped church organ.
Metal whistle similar to that used by most referees. Rugby union match officials must use the following equipment: Coin The referee organises a coin toss with the team captains to decide who kicks off and what end each team takes initially. [5] Whistle Referees must carry a whistle to indicate certain occurrences in the game. [6] Red card
A referee sends a player to the "sin bin" for ten minutes. Spread fingers are used as the signal instead of a yellow card. Yellow card A yellow card is used to signal that a player is being temporarily suspended from the game. The player is sent to the "sin bin" for 10 minutes, after which time they are allowed to return to carry on playing. [4]
User's guide for a Dulcitone keyboard. A user guide, also commonly known as a user manual, is intended to assist users in using a particular product, service or application. It is usually written by a technician, product developer, or a company's customer service staff. Most user guides contain both a written guide and associated images.