ASTM F 963-16 YoYo Ball Tester per lunghezza iniziale e costante elastica

Video Description:
Discover the ASTM F 963-16 YO YO Ball Tester, designed to measure initial length and elastic constant with precision. This tester features a rotating spindle at 80r/min, ensuring accurate elongation length calculations. Ideal for compliance with ASTM F963 standards.