American professional football equipment weight oval sphere

Who knows the rules of football
The most basic equipment in football games is football. The official Rugby of the National Football League is handmade by Wilson sporting goods company. It is an oval sphere, about 27.9 to 29.2 cm longHow heavy is football
The weight of football is actually about 400 grams to 440 grams. The football we observe with the naked eye is fibrous oval, and generally speaking, both traditional football and modern football are sewn with four pieces of corresponding materials to form an external watch caseThe size of football
American football is about 27.94 ~ 28.58 cm long, the circumference of the central position of the ball is about 53.34 ~ 53.98 cm, and the weight is about 396.89 ~ 425.24 grams. Although the ball is olive shaped, it is not as close to the standard oval as British football, but the tips at both ends are "swim bladder body"What is the size and weight of football
Specification of football: football is oval, and the watch case is sewn with four pieces of corresponding materials. Its long axis is 280mm-300mm, the circumference of the long axis is 760mm-790mm, the circumference of the short axis is 580mm-620mm, and the weight is 400g-440gAll rules of American football game
Rules: American football matches are played between two teams with a maximum of 53 players (NFL rules). Both sides send 11 players to play, and some or all of the players on the field can be changed at any time. The one who gets the ball control is the attacker, and the goal is to push the ball to the opponent's position as much as possibleHow many grams is football lighter than football
Football weight: 410-460g. The overall difference between English football and American football: football originated in Britain. After it was spread to other countries, it continued to develop and change. Many countries have created their own forms of football. Such as the United States, Canada, Australia and other countries, football venues, equipment, rulesThe rules of American football
The standard American football game is divided into four sections, each of which is 15 minutes. The second section is called the first half, and the fourth section is called the second half. There is a 12 minute (20 minute college game) halftime between the first and second half. At the beginning of the second half, the ball will kick off again as at the beginning of the gameWho knows the rules of American football? Explain the situation of each team in NFL. Thanks_ Baidu knows
The most basic equipment in football games is football. The official Rugby of the National Football League is handmade by Wilson sporting goods company. It is an oval sphere, about 27.9 to 29.2 cm longWhat is the weight of football
American football, 380-420 grams, baseball standard weight is 141.70 ~ 148.80 grams
What is the length and width of American football
Do you mean the ball? NFL professional ball standard, the diameter of the ball should be between 52.7 cm and 54 cm, the circumference between 27.9 cm and 28.6 cm, and the weight between 396.9 g and 425.2 G. come from http://www.nflchina.com/news/detail/197826