What is twill, table tennis racket? For table tennis rubber rackets with straight or twill grains on the back, the front of the racket is still covered with even dots, while the rubber on the back is covered with horizontal or twill grains, and the lines are straight or twill grains that are parallel to each other. The cross-section of each texture is triangular or rectangular. Because the front and back of the racket have different textures, when catching a ball, you use the front of the racket to catch the ball and the back to catch the ball. The ball's movement direction and degree of rotation are different. When catching the ball, sometimes you catch the ball with the front, sometimes you use the back to catch the ball, or They always use the front to catch the ball, but suddenly change to the back to catch the ball. This will make the opponent unable to defend, thus achieving the purpose of defeating the opponent. Specific implementation method: Use a machine to process the rubber of the table tennis ball into dots on the front and straight or twill texture on the back, and stick it on the table tennis racket.