This machine is designed to measure the number of tests at which the badminton is not out of shape after applying pressure to the badminton mouth. Apply a pressure to the badminton mouth to compress its diameter by 20mmfor 5 minutes. After 3 minutes, check the deformation of badminton
mouth.

　　It is easy to grip the specimen accurately. With a high precision digital caliper, it can accurately measure the deformation of the specimen.