siboasi s3169 badminton racket stringing machine

...Siboasi S516 Badminton Racket Stringing Machine With All Spare Parts Function 1. Intelligent computer automatic pound correction 2. Stable constant pull function. 3. Self-Checking 4. Store memory function, can set 4 groups of data 5. Pulse width modulate, variable speed can be available,protecting the string from hurting when the string is in tension. 6. 4 groups of pre-stretch,suitable for different string......