| http://www.w3.org/ns/prov#value | - A device according to claim 2, wherein the said support comprises a first and second part, each having a passage, one of the first and second parts being fixed whereas the other is rotatable about an axis of rotation and wherein said device further comprises means for rotating the element forming said dihedron at a first algebraic angular speed and means for rotating the rotatable part of said sup
|
