| 摘要 |
The strand has a u-shaped fixing section (2) and a sealing section (1) designed as a tube, where proportions of sealing materials of the fixing section vary in a cross sectional surface of the sealing section, where one of the materials is soft compared to another material. Limiting surfaces other than a limiting surface (3) are traverse inclined to the entire sealing strand and separate the materials from each other, where composition of materials changes in an extrusion direction. |
