FIELD: sanitary and hygienic articles. SUBSTANCE: toothbrush has head with bristles. Bristle bundles of outer rows are secured in head with their two ends so as to form intersecting arcs. Radius of each arc is less than length of bristles of inner rows. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 2 dwg
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|---|---|---|---|
| TOOTHBRUSH | 1996 |
|
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