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The palm of the hand is naturally extended, located outside the upper end line of the table, the ball is placed in the palm of the hand, and the ball is thrown vertically upwards, the angle of inclination of the ball shall not exceed 45 degrees, and the racket shall not be covered when it touches the ball.
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1. At the beginning of the serve, the ball is naturally placed on the palm of the hand that is not holding the clap, and the palm of the hand is open and remains stationary.
The server must throw the ball almost vertically upwards with his hand without spinning the ball and raise it up not less than 16 centimetres after leaving the palm of the non-clapping hand, and the ball must not touch anything until it is struck out.
When the ball descends from the highest point of the toss, the server can hit the ball so that the ball first touches the local table, then passes over or around the net device, and then touches the receiving player's table. In doubles, the ball should touch the right half of the server and receiver in succession.
4. From the beginning of the serve to the time the ball is struck, the ball should always be above the level of the playing table and outside the end line of the server; and must not be blocked by the body of the server or his doubles companion or by anything they are wearing.
As soon as the ball is tossed, the server's non-racket arm should be removed from the area between the ball and the net.
6. When the player serves, the referee or deputy referee should be allowed to see whether he serves in accordance with the provisions of the legal serve.
7. If the referee has doubts about the legitimacy of the player's serve, when it appears for the first time in a game, a heavy penalty will be awarded and the serving side will be warned.
8. Thereafter, the referee will again doubt the legitimacy of the player's or his doubles partner's serve, and will award 1 point to the receiving side.
9. Regardless of whether it is the first time or at any time, as long as the server obviously does not serve in accordance with the provisions of the legal serve, no warning is required, and the receiving party shall be awarded 1 point.
If a player is unable to strictly comply with certain rules for legal serving due to a physical injury, the referee may decide to exempt him/her.
Extended Materials. Serving Notes.
1. Before serving, the ball must be on the palm of the hand, not on the fingers to pinch, and the palm must be stretched flat. A common mistake is to hold it with your hands, with your palms not stretched out, and to throw the ball out with spin.
2. The height of the throwing ball is not less than 16 cm, and the ball can only be hit when it must be lowered after throwing. A common mistake is not to throw the ball up, but to throw it onto the racket with your hand and to cover it with your hand in front of the racket.
3. When serving, the ball must be above the table and outside the end line, and there must be no cover for the receiving side and the referee.
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The rule of table tennis serving is that when the ball falls from the highest point of the toss, the server can hit the ball, so that the ball touches the local table area first.
When a player serves, it is his responsibility to let the referee or sub-referee see whether he is serving in accordance with the rules of legal serving. In doubles, the player with the skin serves first, then the receiver responds legally, then the server's partner responds legally, and then the receiver's partner responds legally, and then the player takes turns to fight back legally.
When serving, the ball should be placed on the palm of the non-clapping hand, with the palm open and flat. The ball should be stationary, behind the end line of the serving side and above the level of the playing table. The server must throw the ball almost vertically upwards with his hands, without spinning the ball and causing the ball to rise by not less than 16 centimetres after leaving the palm of the non-clapping hand.
Table tennis competition rules
According to the changes made by the ITTF, Chapter 6 and Chapter 7 of the previous edition have been revoked. The "World Class Competitions and ITTF Approved Competitions – Competition** Guide" and the "International Open Championship Recommendations" are listed separately. If a game has not been completed for 10 minutes (except when both players have scored at least 9 points), or at any time before that, at the request of both players, a rotation of serve shall apply.
When the time limit for the rotation of the serve is up and the ball is still in play, the referee shall immediately suspend the game. The server of the suspended round serves and the game continues. When the time limit expires, the ball is not in play, and the ball should be served by the receiver of the previous round and play should continue.
After that, each athlete takes turns serving a one-point shot until the end of the innings. If the receiving side makes 13 legal returns, the serving side loses one point. Once the method is practiced, the remainder of the match must continue until the end of the match.
The above content refers to the rules of the encyclopedia - table tennis.
First of all, there is a table tennis ball storage device, such as a barrel, a square box, a funnel and other containers for putting the ball, and then there is a device for transporting the table tennis ball to the launch site, which is commonly used in a mechanical way, I use a pneumatic method, and the conveying process includes controlling the frequency of the serve, and finally the launch device, which generally uses rubber friction wheels, and also uses springs to hit the way, but can not send a rotating ball. The launcher is also usually responsible for controlling the direction of rotation of the ball. I have recently become obsessed with table tennis ball machines, DIY has desktop and floor ball machines, interested can contact me, provide finished products and components, can also provide technical advice.
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Since it's an amateur, it's good to have fun, isn't it nice to play with good friends? Don't keep trying to improve your skills unless you have another purpose.