Abstract: Tennis ball machine has great performance in tennis training and is prevailing among tennis players. However, three major problems of contemporary products-inaccurate control, high cost, and ...

Abstract: Nowadays, rod pump is widely used in oilfield. Since most oil production equipment like pumping pumps are distributed in the wild, they are usually checked by manual inspection. In the event ...

Rod Laver is an icon of tennis, a player who revolutionised the game during the 1960s. The Australian, a winner of 11 Grand Slam singles titles, is the only male player in tennis history to win all ...

The Australian Open will introduce a spectacular new tradition with its first-ever Opening Ceremony, taking place on Saturday 17 January, the night before the main draw begins. Launching the first ...

Former professional tennis player Eugenie Bouchard basked in the Miami sun after stripping down to a leopard print string bikini aboard a luxe yacht in Miami. “Always a good idea,” the Montreal native ...