常见例句Keywords rigid visco-plastic FEM, cannonball body semiproduct, precision forming, pressing, punching, ironing, shell nosing; 刚（粘）塑性有限元法;炮弹弹体毛坯;精密成形;压型;冲孔;引伸;收口;semiproduct management 半成品管理 返回 semiproduct