| 摘要 |
FIELD: shipbuilding. ^ SUBSTANCE: invention can be used mostly on the undersized sailing boats. The leeboards contain the left quill, the right quill, the left axis, the right axis, the left removable clamp, the right removable clamp, the left shock cord and the right shock cord. The left axis is fixed at the portside; the right axis is fixed at the starboard. At the left axis, the left quill and the left removable clamp are installed; at the right axis, the right quill and the right removable clamp are installed. The standing part of the left shock cord is fixed at the left quill; the standing part of the right shock cord is fixed at the right quill. The shock cords contains the supplemental left plate with the long slot, the right plate with the long slot, the left springing element and the right springing element. The left plate if fixed at the portside; the right plate is fixed at the starboard. The left plate slot is open from the stern side; the tight plate slot is open from the stern side. The left quill is placed in the left plate slot; the right quill is placed in the right plate slot. The leading end of the left springing element is fixed at the portside; the tail end of the left springing element is fixed at the left quill. The leading end of the right springing element is fixed at the starboard; the tail end of the right springing element is fixed at the right quill. ^ EFFECT: sailing safety is increased. ^ 3 dwg
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