"resin" . "Effect of lane characteristics on ball motion" . . . "bowling balls" . "Effect of delivery characteristics on ball motion" . "bowling ball(s)" . "Bowling ball#Effect of coverstock, core and layout on ball motion" . . "ball motion" . . . "Bowling ball" . "balls" . . "Bowling ball#Effect of delivery characteristics on ball motion" . "Bowling Balls" . . "ball" . "Effect of coverstock, core and layout on ball motion" . "Bowling ball#Layout and grip" . "Bowling ball" . "Bowling ball#Duckpin balls" . . "Bowling ball#Ball motion" . "breaks down" . "bowling ball coverstock" . "bowling ball" .