| 摘要 |
A boat hull is prepared from a plurality of elongate extrusions, for example of aluminum. Each extrusion has, at one edge, a projecting tongue and at the other edge a groove. The projecting tongue may be inserted into the groove and may be snap-fastened into position. The tongue and the groove are dimensioned to define a clearance therebetween, and the clearance is filled with an adhesive so that the extruded sections are tightly joined with each other.
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