ASTM F 963-16 YO YO Ball Tester для первоначальной длины и эластичной константы

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.
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