| 摘要 |
<p>PCT No. PCT/EP86/00172 Sec. 371 Date Dec. 1, 1986 Sec. 102(e) Date Dec. 1, 1986 PCT Filed Mar. 22, 1986 PCT Pub. No. WO86/05668 PCT Pub. Date Oct. 9, 1986.A closed frame is formed of a series of longitudinal pieces and a series of interlocking corner elements acting to hold the frame in assembled relation.</p> |
