ball machines meaning in English
网球墙
Examples
- Makes a table tennis robot and ball machine . online catalog
-生产乒乓球底板球拍海绵胶皮等系列产品。 - Blowing ball machine specification
吹球机押注说明： - Introduced the state - of - the - art ball machines and other training equipments
引进了国际先进的发球机和其他教学辅助设备。 - Automatic control pre - water ball equipment for cement industry - disc ball machine
水泥工业用自动控制预加水成球装备盘式成球机 - In this paper , the structure characteristics and lubricating theory of teflon is studied , and tribology capability of teflon is researched on four - ball machine , and the serviceability and development of teflon used as lubricant additive is discussed
摘要研究了固体润滑剂聚四氟乙烯的结构特征和润滑原理，使用四球摩擦试验机研究了聚四氟乙烯的摩擦学性能，探讨了聚四氟乙烯作为润滑添加剂的应用现状与发展前景。