| 摘要 |
<p>The invention relates to a method for producing a frame material, which is constructed from at least one blank, comprising a compressible core 11, 21 of round section, surrounded by a uniformly thick layer of fibres 12, impregnated with liquid thermosetting plastic. The blank(s) is/are formed and hardened in a mould cavity, the cross-sectional shape of which in the bottom section differs substantially from that of the blank. <IMAGE></p> |
