How to thread a football explain the situation of each team in the NFL

Who knows the rules of American football? Explain the situation of each team in NFL. Thanks_ Baidu knows
The circumference of the long axis section of the football center is about 72.4 cm, and the circumference of the short axis section is about 54.6 cm. The weight is about 397-425g. Rugby consists of an inflatable polyurethane bladder and an outer cow leather cover, and is stitched with an olive cord. The olive rope is a cotton thread covered with vinylWhat are the requirements for a football belt
You're talking about the stitches in American football. The most important function is that when the quarterback passes the ball, his fingers grasp the stitches to ensure that the ball can rotate wellDetailed rules of football
American football scores in the form of: 6 points for touchdown with the ball; After reaching the array, kick and shoot, and score 1 point; 3 points will be given if the shot is made during the competition; If the opponent is forced into a dead ball in the opponent's division, it will be counted as a safety score, and 2 points will be obtained. Rules of football match. A kick given to a non foul team after a foulThe rules of American football
Each football is composed of four pieces of leather (or plastic). The workers formally start the production process after a series of quality inspections on the weight and cracks of each piece of leather. Two of them are perforated at the connecting edge and tied together with threading ropes. One of the bound leather blocks is perforated with two rows of holes and reinforced in the center to fix the inflation pistonThe rules of football
Their different styles and playing methods have won very interesting nicknames. Rugby is called "the barbaric game played by gentlemen", while American football is called "the barbaric game played by barbarians". Rugby players do not wear protective equipment, and basically use the clothes of football playersHow to play football
The basic points of American football football football matches focus on the use of positional attack and defense and offensive tactics. The team with more points at the end of the game wins. Each team has 11 offensive players, 11 defensive players and several secret service players. In the game, one side is the attacking side, and the other side is the aggressive group; The other side is the defender, in the defensive group. Both sides are offensive and defensive to each other. BeautyWho knows the rules of football
The circumference of the long axis section of the football center is about 72.4 cm, and the circumference of the short axis section is about 54.6 cm. The weight is about 397-425g. Rugby consists of an inflatable polyurethane bladder and an outer cow leather cover, and is stitched with an olive cord. The olive rope is a cotton thread covered with vinylAll rules of American football
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 can change some or all of the players at any time. The one who gets the ball control is the attacker, whose goal is to push the ball to the opponent's position as far as possibleFootball skill name
In 1990, Beijing Agricultural University and other institutions of higher learning took the lead in establishing the English football teamWhat are the key points of football transmission
Pass the ball in place without turning (pass the ball to the left as an example) method of holding the ball: the five fingers open naturally, and press the thumb on the convex part of the ball. The palm is empty and the fingers grip the ball. Keep your wrists flexible. Action tips: open your feet left and right, bend your knees and lower your center of gravity. When passing the ball to the left, the waist turns to the left to watch the passing target first, and the two hands pull the ball back, and