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  2. Wilson ProStaff Original 6.0 - Wikipedia

    en.wikipedia.org/wiki/Wilson_ProStaff_Original_6.0

    This model retained the thin 17 mm beam throughout its length but has increased weight from 12.6 to 12.8 oz (360 to 360 g) strung, is slightly less head-light (six points rather than eight), with an 88-square-inch (570 cm 2) head size, up from 85 in the Pro Staff Original (the Pro Staff 6.0 was produced in a number of sizes) and with 19 rather ...

  3. Tennis court - Wikipedia

    en.wikipedia.org/wiki/Tennis_court

    The ball must completely miss the line to be considered "out". This also means that the width of the line (except for the center service line) is irrelevant to play. The center service line is 2 in (5 cm), the other lines are between 1 and 2 in (3 and 5 cm) wide, whereas the baseline may be up to 4 in (10 cm) wide. [1]

  4. Li-Ning - Wikipedia

    en.wikipedia.org/wiki/Li-Ning

    The company was founded in 1989 by Li Ning, a former Chinese Olympic gymnast.As of 2015, Li Ning remained the chairman of the company's board of directors. [3] In 2005, Li-Ning created a joint-venture with French sports apparel company, AIGLE, giving Li-Ning the exclusive right to be the sole distributor of AIGLE's products in China for 50 years. [4]

  5. Tennis technology - Wikipedia

    en.wikipedia.org/wiki/Tennis_technology

    Mid-plus: 94–105 square inches (610–680 cm 2) Oversized: 106–122 square inches (680–790 cm 2) Super-oversized: 122 square inches (790 cm 2) and larger; The balance point and grip size of a racket changed as technology progressed. Depending on the player's style of play, choice is made between a head-heavy racket and a head-light racket.

  6. Racket (sports equipment) - Wikipedia

    en.wikipedia.org/wiki/Racket_(sports_equipment)

    Squash racket and ball Racquetball racket and ball. A racket or racquet [1] is an item of sporting equipment used to strike a ball or shuttlecock in a variety of sports. A racket consists of three major components: a widened distal end known as the head, an elongated handle known as the grip, and a reinforced connection between the head and handle known as the throat or heart.

  7. Slide rule - Wikipedia

    en.wikipedia.org/wiki/Slide_rule

    Typical ten-inch (25 cm) student slide rule (Pickett N902-T simplex trig) A slide rule is a hand-operated mechanical calculator consisting of slidable rulers for evaluating mathematical operations such as multiplication, division, exponents, roots, logarithms, and trigonometry. It is one of the simplest analog computers. [1] [2]

  8. Platform tennis - Wikipedia

    en.wikipedia.org/wiki/Platform_tennis

    The dimensions of 39 feet (12 m) by 18 feet (5.5 m) were expanded to the 44 feet (13 m) by 20 feet (6.1 m) size of a badminton court. As this left a narrow strip out of play between the court and the fencing, the fences were put into play and players were allowed to hit the ball after it hit off of the fence. [ 5 ]

  9. Rackets (sport) - Wikipedia

    en.wikipedia.org/wiki/Rackets_(sport)

    Rackets or racquets is an indoor racket sport played in the United Kingdom, United States, ... A player uses a 30.5-inch (77 cm) wooden racket, known as a bat, to hit ...