| 摘要 |
Disclosed is a coupling device comprising a head portion having a base surface and a stud portion projecting from the head portion to pass through an opening of a rigid support sheet to which the device is to be secured. A bore for receiving a retaining pin extends through both the head and the stud portions and is inclined at such an angle as to guide the retaining pin into a tight contact with the bottom edge of the opening, thus retaining the stud portion in the support sheet.
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