| 摘要 |
Boards of lumber or the like which exhibit defects such as knots or knotholes are repaired by cutting a bore through the board at the site of the defect and by filling the bore with a plug of conforming shape. The width of the bore changes at a first location along its axis and undergoes a reverse change at another location in order to interlock the plug with the board. The plug may be formed by filling the bore with hardenable mastic or by fitting conforming pieces of wood or the like into opposite ends of the bore, the pieces being abutted and secured together by adhesive. The interlocking configuration of the bore and plug assures that the plug cannot be ejected from the board.
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