| 摘要 |
A cap for closing comprising a cylindrical shell and a bottom, in the center of which a round tear-off area is made which is limited by transversal slits, and the bottom surface is designed as a flat surface with three cross-cutting slots, the tear-off area has minimum bends outward, the shell is made with a smooth cylindrical surface, and the connection of the bottom with the cylindrical shell is made with a minimum radius at a right angle. |
