Watch the job. The table is fine, flat and vertical, and the links are sewn up; the paint is smooth and smooth. Also, hit the edge of the bank a little hard on the waist and see if the ball on the table moves? To shake as little as possible. The incapacitating table indicates that the wood used is hard and good。
Watch it. The ball is thrown out with its hands close to the table or hit hard with a bat to see the number of bounces on the long or short side of the table to determine the size of the impact. Long edge 4 to 4 and a half, short edge 4 and a half to 5. Another way of identifying it is to hit it hard on the right towards the middle of the second vault near the top pocket, with a ball that can be hit more than six times。
On the horizontal table, the ball is pushed gently with a pole in the direction of vertical, horizontal, tilted, etc., at a speed of 0. 2 m/s, with no change in line。
The touch table. Touching in the direction of the penthouse (i. E., in the direction of the counter-crop) is much like touching the twilight, and touching in the direction of the bottom, the more delicate, the smoother, the smoother, the better, the way to identify the high, the middle, the high, the medium, the main way to identify the table. Moreover, in a quieter environment, the sound of the ball rolling on the stage can identify the quality of the mud, i. E., the sound of the ball 's grunts ' when it rolls on the national production table, while the sound of the entry table is small or non-existent。
Listen to the tablet. Scratch the surface of the tablet with a ball, and there will certainly be a clear noise of a latching sound different from that of the rest. (when there's a table, it's lighter to knock in case there's a hole out of the table) and rolls on the surface of the flat, scratched, and carefully cleaned table, with a small, continuous sound. "belgian balls, good for new balls."
Listen to the library. Medium strength
A hand-splashing ball hits the edge of the library, listens to the sound of impact on the edge of the library, makes a sound similar to a “punch” or “punch” sound, indicating softer materials, poor work or looseness by the edge of the library. Impacts on different parts of the entire library, with the same sound。
