| 摘要 |
In at least one embodiment, the present invention relates to a polymeric dog bone comprising an elongated central body portion having an end portion. At least one end member extends from the end portion of the central body portion. In at least one embodiment, the end member has a first surface, a second surface, a plurality of first-shaped features located on the first surface, and a plurality of second-shaped features having a different shape than the first-shaped features located on the second surface.
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