| 摘要 |
The isokinetic analysis of the forces upon the human muscles of the forearm, wrist and hand from the forces encountered by the tasks of support and stabilization are reduced by the inclusion of sections along the rail in the direction(s) of said task forces, in sufficient length and shape to engage repeated gripping. The human user can impart less force to prevent slipping and loss of control with less strain of muscles required for gripping. Non-obvious embodiments include portable devices such as ladders, boats and bus hand rails.
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