Assertion: racket's string | /r/HasProperty | free of any device
Facets:
Source sentences:
text: The frame, including the handle, and the strings, shall be free of any device which makes it possible to change materially the shape of the racket, or to change materially the weight distribution in the direction of the longitudinal axis of the racket which would alter the swing moment of inertia, or to change deliberately any physical property which may affect the performance of the racket during the playing of a point.