“four-ball test machine”的概念、定义、翻译、参考文献-科学参考

单词	four-ball test machine
释义	four-ball test machine Encyclopedia 工学摩擦学试验释 four-ball test machine四球试验机以一个钢球在压力作用下，相对三个同尺寸水平固定钢球旋转摩擦的摩擦试验机。简称四球机。
随便看	grassland hydrology and water resources grassland in Aba grassland in Altai grassland industry of China grassland in Ganzi grassland in mountain areas of southern China grassland in northwestern Sichuan province grassland invasive plant grassland irrigation grassland irrigation cycle grassland irrigation efficiency grassland irrigation quality grassland irrigation quantity grassland irrigation uniformity grassland irrigation water use efficiency grassland landscape grassland law Grassland Law of the People’s Republic of China grassland leisure tourism grassland livestock grassland-livestock system coupling grassland mammals grassland management grassland multifunctionality grassland nationalities

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。