| 摘要 |
Of the two elements 1, 2 to be fitted together, one has a projection 8 and the other has a recess 4 adapted so as to receive the projection, one of the elements 1 being machined to accurate dimensions while the other element 2 is made by extrusion or a similar method. The machined element 1 made of hard material has portions 9-11 which serve as cutting members, while the other element, made of a softer material, has, adjacent to portions 12 for engagement with the first element, extra material 14 which is intended to be entirely or partly removed during assembly of the elements. <IMAGE> |
