| 摘要 |
A holding device comprises a top, an actuable body, and a base. The top has a depending portion which defines a holding aperture. The top is connected to the base at the depending portion, and the actuable body is disposed about the depending portion. Adjustable holding elements are disposed within the holding aperture. The adjustable holding elements are shiftable between an extended and a retracted position in response to actuation of the actuable body.
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