It is designed to reduce sharp vibrations caused when the ball hits the racket.
(It; is designed; to reduce sharp vibrations) (It; to reduce; sharp vibrations caused) (sharp vibrations; caused; T:when the ball hits the racket) (the ball; hits; the racket)
It It sharp vibrations the ball
is designed to reduce caused hits
to reduce sharp vibrations
sharp vibrations caused
T:when the ball hits the racket
the racket