The inner container is the bladder, the heart of the ball. It is made of black rubber on the innermost layer of the ball.
The epidermis is divided into synthetic leather (superfine strong fiber, PU, PVC, etc.). ) and dermis; The ball mouth is used to inflate the ball. There are balls of different sizes. Basketball is divided into three sizes: size 7, size 6 and size 5. Volleyball is divided into three sizes: No.5, No.4 and No.3; Basketball No.7, volleyball No.5.
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1892, basketball was first introduced to Mexico from the United States and soon spread all over Mexico. In this way, Mexico became the first country outside the United States to develop basketball. Since then, this sport has spread to France, Britain, China, Brazil, Czechoslovakia, Australia, Lebanon and other countries, and has been developed, popularized and developed all over the world.
1895, American Bob Gale introduced basketball to China. 1896, Tianjin YMCA held the first basketball competition performance in China. Then it was launched in youth clubs in Tianjin, Beijing and other cities.
19 10, basketball was listed as a performance item for the first time in the first national sports meeting in old China. Basketball was listed as a formal event for men in the 2nd National Games on 19 14 and as a formal event for women in the 3rd National Games on 1924. Basketball has been an official event of the Asian Games since 195 1.
The International Amateur Basketball Federation was founded in 1932, and men's basketball was recognized as an official Olympic event by the International Olympic Committee. From 65438 to 0946, the professional basketball league appeared in the United States and developed into the current NBA.
Women's basketball didn't develop until the early 20th century. From 65438 to 0976, women's basketball was listed as an official Olympic event.
Baidu encyclopedia-basketball