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. 2015 Sep 16;10(9):e0138506. doi: 10.1371/journal.pone.0138506

Fig 3. Changes in the static grip force and slip force (A), grip-to-load force (GF/LF) ratio (B), coefficient of friction (C), and relative safety margin (D) in relation to object mass for each surface condition.

Fig 3

The data represent the mean and standard deviation (vertical bars) values of 17 subjects.