-
Anonymous users2024-02-08"Putian Tongqing" is a non-World Cup match ball, and its specifications and parameters:
The following is a comparison of the specifications and FIFA standards of "Celebration of the Whole World".
Circumference: "Universal": - centimeters FIFA standard: centimeters.
Roundness: The diameter of the ball is measured in 16 different places.
"Celebration of the whole world": maximum error FIFA standard: maximum error water absorption: the football needs to be pressed 250 times in water.
"Celebration of the whole world": zero weight gain FIFA standard: maximum weight gain of 10% weight. "Celebration of the whole world": 440 + - g FIFA standard: 420-445 grams.
**Performance: In the test, the ball was dropped from a height of two meters to the steel plate, which was repeated 10 times.
The height of the :* is between 143 and 149 cm according to FIFA standards: the difference between the highest and lowest** heights in 10 times is not more than 10 cm.
Pressure loss: Air pressure is measured after 3 days of inflation.
"Putian Tongqing": maximum pressure loss 10% FIFA standard: maximum pressure loss of 20% "Putian Tongqing" is not made of 32 balls sewn by hand, but is made of 8 balls thermally bonded, which has higher roundness and stronger water resistance.
Grooves: Grooves are used to reduce air resistance and improve lateral stability in flight.
Embossing: Embossing is used to provide extra grip, which in turn improves the control of the goalkeeper and other players on the ball.
-
Anonymous users2024-02-07The balls are round, made of leather or other suitable materials, and are usually made of 12 pieces of black pentagonal fabric and 20 pieces of regular hexagonal fabric. The circumference of the sphere shall not exceed 70 cm (28 inches) and shall not be less than 68 cm (27 inches). The weight of the ball, at the start of the game, must not exceed 450 grams (16 ounces) and must not be less than 410 grams (14 ounces).
The air pressure of the ball, at sea level, is to atmospheric pressure (600 grams to 1100 grams per square centimeter to pounds per square inch).
-
Anonymous users2024-02-06Different brands have different workmanship and materials.
-
Anonymous users2024-02-05The size of the football is distinguished:
The ball, with a diameter of centimeters, is a regular 11-player ball.
Ball size, 19 cm in diameter, 5 or 7 player match ball.
The ball, 18 cm in diameter, is used for children to train and learn.
Ball, 15 cm in diameter, for children's play.
Ball, 8 cm in diameter, for children's play.
Soccer model:The model of the football is divided into 1-7 balls, the 1 ball is often used as a decoration or for playing in the palm of the hand, the size is about the size of a palm, the diameter of the ball is slightly larger than the 1 ball, most of the balls for young children to play, in fact, the difference with the 1 ball is not too obvious, the diameter is about 16cm.
No. 3 football began to have a strict size limit, No. 3 football is mostly used as a children's training ball, for 5-12 years old children, the regular No. 4 ball and No. 5 ball are too large, which is not conducive to children's training, generally the diameter of 18cm is the best.
No. 4 football is mainly used for 5-a-side events and 7-a-side games, or field football, as well as the popular cage football ball in Europe and the United States, and some 9-a-side games also use the ball, which is generally about 20cm, and is common between.
Mass and measurement Ball · round ; Made of leather or other appropriate materials; The circumference is not longer than 70 cm (28 inches) and not shorter than 68 cm (27 inches); The weight is not more than 450 grams (16 pound taels) and not less than 410 grams (14 pound taels) at the start of the race; The pressure at sea level is equal to one atmosphere (600 1100 grams square centimeter, pounds square inches). Replacement of Bad Ball if the ball is broken or damaged during the game; Stop the game; - Restart the game with a dropped ball at the location where the original ball was broken. If the ball is broken or damaged during a dead ball such as a kick-off, goal kick, corner, free kick, penalty kick or throw-in: >>>More
At some point, the renunciation of generosity has not yet begun, and there are still a few months left.
Offside means that the attacking team in the first half (offensive half), the moment of passing, the player who passes the ball arrives, and there are no defenders or only defenders other than the goalkeeper between the offensive bottom line, which is called offside >>>More
1. The charm of football.
The charm of football comes from its difficulty and inability to score goals. Because of these two characteristics, football is different from other ball sports, and it is also very different in the whole competitive sport. Technique, physical fitness, and on-the-spot play usually determine the outcome of a match. >>>More
1. The concept of offside position.
1) During the game, when a player is in the following situations, the player is in an offside position: >>>More