Hecla & Griper 唱片名
For the effect racket-holding, there is specially higher requirement of footwork for Pen-hold griper.
特别是直拍运动员，由于受握拍法的影响，对步法的要求比较高。
A 3d finite element analytic model was established for the rapier driving system to investigate the structural features of its griper heads, belts and wheels.
针对剑杆织机剑带、剑头、传剑轮的结构特点，建立了传剑系统三维有限元分析模型。
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