| 摘要 |
The screw fastener includes a driving force controller for transmitting a thrust force to a screw, a vacuum seal portion for automatically maintaining vacuum balance, a rotation spindle for receiving the driving force in fastening the screw, a screw fastening unit having a detector for detecting the fastening height of the screw, an air unit for raising the screw fastening unit, a raising guide unit for guiding the raising of the screw fastening unit, and a jaw unit, thereby minimizing the maintenance of the apparatus.
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