| 摘要 |
One piece(12) has more than one of holes(24) on the attaching surface. The other piece(26) has more than one of extruded portion (42), which inserts into the hole of the piece(12). The extruded portion has an extended hole(44). One of the hole portion has a irregular surfaces(48), which is located at the extended hole of the piece(12). A holding piece(54) expands the irregular portion (48) radically in the hole(24) and attaches it withe the piece (12). The holding piece(54) has a device apparatus(50), which is extended through the hole of the extruded portion(42). The rotation of the device in the hole(44) improves the fastening of the irregular surfaces(48) with the piece(12). |
