| 摘要 |
Toothbrush having a rigid handle and a head part with a multicellular resilient pad made of compressible polyurethane sponge, the pad having a configuration of a hexagonal cylinder, one of which surfaces is provided with a concavity. The concavity has a gutter or gutters parallel to the axis of the hexagonal cylinder. The pad may have a groove or grooves parallel to the axis of the hexagonal cylinder on the back side surface of the pad.
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