The principle of serving the hook on the short side, it is very important to find the feeling
4:56
Horizontal hook short side down serve, leverage is very important (Part 1)
21:12
学乒乓球要学会算球, 算的就是什么
15:26
勾手发球的三个阶段及训练方法，全世爆国手教学精选【中英字幕 】
25:38
发接–勾手发球的侧旋和侧上旋 | Serve and return – side spin and side topspin on hook serve
14:14
张继科指导学员逆旋转发球
7:37
How to judge straight hook serve, multi-angle display
7:55
直板勾手发球讲解
14:14