Trajectory of two-seam fast ball
420 ツーシームボールの軌跡と効果

Toshitsugu HARA, Yuhgo MATSUI, Keigo MORIYA
2002 The Proceedings of Conference of Kanto Branch  
doi:10.1299/jsmekanto.2002.8.459 fatcat:ozjjxxp35jbqddt66zs2ilhzrm