ductile metal短语⁷²⁶⁶³ 基本例句 韧性金属 The technical method and milling mechanism of ductile metal were investigated by using the planetary ball miller and wet lapping method as well taking plumbum as the typical ductile metal. 采用行星式球磨机和湿式研磨法，以铅为对象探讨了制备软金属纳米粒子体的工艺方法和研磨机理。 cnki