| http://www.w3.org/ns/prov#value | - A mechanical toothbrush according to claim 1, wherein said brushes have outer surfaces which, during rotation, move towards one another at one side of the brushes and away from one another at an opposite side of the brushes, said head including a case surrounding said brushes at the side at which the outer surfaces of the brushes move away from one another during rotation, said outer surface of th
|
