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Mean and standard error of safety margin (SM) and safety margin due to object fragility (SMFR). Data are shown for the four different FR-indices for one- and two-hand conditions. A: SM in Interval Δ T1. B: SM in Interval Δ T3. C: SMFR in Interval Δ T1. D: SMFR in Interval Δ T3.
