| 摘要 |
<p>The corkscrew spiral of the invention can be mounted on any conventional corkscrew device and has a pointed extremity to facilitate its introduction into the cork in a known manner, and the opposite extremity is conformed as substantially joined turns (1a) having a diameter which is equivalent to the remainder of the spiral and forming an axial orifice to which a roller bearing (2) has been coupled externally, with its central axial orifice facing said group of turns in order to provide for the passage of an element (3) intended to fix the roller bearing to the spiral.</p> |
