| 摘要 |
PCT No. PCT/DK86/00079 Sec. 371 Date Mar. 10, 1987 Sec. 102(e) Date Mar. 10, 1987 PCT Filed Jul. 7, 1986 PCT Pub. No. WO87/00032 PCT Pub. Date Jan. 15, 1987.A dental cleaning tool comprises a rotatable cleaning body of an elastically yielding material formed in a cuplike concavity extending inward from a rim and where curved ribs having triangular cross-section extend from the rim towards the center of the cup to a point removed from the center so as to provide a free zone at the center of the cup. |
