球冲击 meaning in Chinese

pellet impact

Falling ball impact test
落球冲击试验
Ball impact test
钢球冲击试验
The authors studied the structural design and the working principle of two new types of water - saving percussion tools , water - saving hydro percussive tools and pneumatic steel ball percussion tools
从分析干旱缺水地区节水型冲击器的设计思路出发，对两种新型节水冲击器风动钢球冲击器和液动冲击器的结构设计、工作原理进行了研究。