| 摘要 |
A fastener of the kind in which a pin can be inserted into a closed housing between balls provided in a tapering space within the housing, which balls prevent the subsequent removal of the pin through the exercise of clamping action on the pin upon attempts to remove the pin from the housing, wherein the housing having a chamber housing a substantially freely rotatable body having a tapering cavity therein and a central aperture for the insertion of the pin therethrough, the cavity containing the balls, the balls having linear contact with the wall of said cavity.
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