| 摘要 |
PCT No. PCT/DK90/00056 Sec. 371 Date Aug. 27, 1991 Sec. 102(e) Date Aug. 27, 1991 PCT Filed Feb. 27, 1990 PCT Pub. No. WO90/09734 PCT Pub. Date Sep. 7, 1990.A buoyancy body including an assembly of smaller parts formed in such a manner that the smaller parts have no large thickness. The parts are individually produced as foam plastic parts in order to achieve a desired small cell structure. The assembled buoyancy body provides a solid form plastic ball from only two parts, without these parts, at any place, having a material thickness that is more than just a fraction of the ball diameter.
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