| 摘要 |
PCT No. PCT/AU92/00522 Sec. 371 Date Mar. 29, 1994 Sec. 102(e) Date Mar. 29, 1994 PCT Filed Sep. 30, 1992 PCT Pub. No. WO93/07412 PCT Pub. Date Apr. 15, 1993This invention relates to improvements to reinforced ribbed structures, and in particular to reinforced or strengthened spirally wound pipes or tubes made from composite materials. |
