This text carries on new theoretical thinking to high jump technology by the revelation from the model experiment of little ball and pole vault sports.
从小球模型实验和撑竿跳高运动所得到的启示，来对跳高技术进行新的理论思维。
A golf club head comprises a ball head main body that is formed by moulding and a pole combining pipe fittings made of nonmetal.
一种高尔夫球杆头，包含浇铸成型的球头主体，以及非金属制的杆结合管件。
Considering small space in the single-pole-tower and its cheapness, the author tries to use the ball vibration absorber to control the wind-induce vibration of the single-pole-tower.
考虑到单管塔结构内部空间狭小和制作成本低等要求，本文尝试在单管塔上设置钢球减振器以达到控制结构风振的作用。
Considering small space in the single-pole-tower and its cheapness, the author tries to use the ball vibration absorber to control the wind-induce vibration of the single-pole-tower.
考虑到单管塔结构内部空间狭小和制作成本低等要求，本文尝试在单管塔上设置钢球减振器以达到控制结构风振的作用。
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