| 摘要 |
A cross-section of the mast of this invention exhibits an external portion having roughly the form of a horseshoe, an internal portion arranged within the external portion for reinforcement thereof and having the form of an arc of a circle with the same axis of symmetry and open on the same side as the external portion, the ends of the arc being respectively coupled to the arms of the horseshoe and two closing members fixed to the respective arms and forming two lips which partially close the horseshoe opening but leave therebetween sufficient space to allow passage of a sail retained within the mast. Such arrangement is applicable to masts having an internal sail roller. |
