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What is the equation to find the rebound deflection if the relationship between intermediate deflection reading Di and the final deflection reading Df is Di-Df<0.025 mm?

What is the equation to find the rebound deflection if the relationship between intermediate deflection reading Di and the final deflection reading Df is Di-Df<0.025 mm? Correct Answer D=0.02(Do-Df)mm

The equation to find rebound deflection when Di-Df<0.025 mm is given as D=0.02(Do-Df) mm. D=0.02(Do-Df)+0.02k(Di-Df) mm is the equation used when Di-Df>0.025 mm. Do is the initial deflection reading.

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