| 摘要 |
A batten which is made of a plastic profile, that seen on a transverse sectional view, consists of several cavities next to one another, in order to hold close fitting inserts. In this manner it can be obtained that the stiffness of the batten is changing gradually, because the reinforcing inserts in the cavities have a different length. The stiffness of the batten can be changed in a simple way and right along its full length. The profile and rod-like inserts are substantially constant in cross-sectional dimension throughout their length and consequently easy and cheap to manufacture. |
