| 摘要 |
Novelty: a competition beach racket made of sea plywood is disclosed herein. Technical features: an internal air vacuum chamber aiming at the oscillation of the impacting ball (tennis ball or the like), and homocentric circular perforations which are formed at selected points in order to reduce air resistance. The thickness of the final layer, the depth of the vacuum air chamber, the plurality and the diameter of said perforations lead to the construction of a racket of variable weight ranging from 300 gr and over; said sea racket is accessible to kids, adolescents and adults for competition or entertainment purposes. Advantage: accurate construction, short production time and, thereby, minimization of the cost of the final product due to the use of advanced CAD-type drawing software combined with modern machinery (e.g. CNC wood machines). |
