kemll ball

Company Introduction

manufacturing process is usually carried out random tests, or after a tennis ball to shoot the completion of all tests. Testing along the length of the bending strength of the impact on the direction of the racket has a special three-point bending experiments that test. On both sides of the racket face each selected to support two rackets, while in the watch clock point 5 and 6 o'clock position on the other side in the 10 o'clock and