| 主权项 |
1. A method of attaching a plate to a material, the method comprising:
attaching a washer part to a first part, wherein:
the first part comprises a first central hole, a plurality of first projections, and a plurality of first holes, wherein the first projections and first holes are disposed around the first central hole; andthe washer part comprises a second central hole, a plurality of second holes corresponding to the plurality of first projections, and a plurality of openings corresponding to the plurality of first holes, wherein each first projection of the first part fits through a corresponding second hole of the washer part; placing the washer part and the first part on a first side of a first material of a product; placing a second part having a plurality of second projections on a second side of the first material; causing each of the plurality of second projections to penetrate a respective opening of the washer part and a respective first hole of the first part, wherein penetration by each second projection through the corresponding opening of the washer part causes a deformation of a portion of a second material of the washer part proximate to the corresponding opening toward the first part, wherein the deformed portion exerts a force on the second projection and prevents removal of the second projection from the corresponding opening. |
