| 摘要 |
<p>A plurality of pointed nail-like members extend from a surface of a circular base plate in spaced mutual relation parallel to the axis thereof. A cylindrical side is affixed to the base plate around the circumference thereof. A plurality of pointed naillike members extend from a surface of a circular cover plate in spaced mutual relation parallel to the axis thereof. The cover plate is releasably secured to the base plate with the nail-like members of each pointed toward the other with the points spaced from each other whereby when the cover plate is coaxially secured to the base plate with a plurality of nuts placed on the base plate and the device is manually contrarotated a plurality of times, most of the nuts are shelled.</p> |
