实验得出，阶跃式变参数振动钻削效果明显优于相应条件下的普通钻削。
It is indicated by test that the effect of step type variable parameter vibratile drilling is more superior than that of common drilling at corresponding conditions.
实验得出，阶跃式变参数振动钻削效果明显优于相应条件下的普通钻削。
It is indicated by test that the effect of step type variable parameter vibratile drilling is more superior than tha...
针对叠层复合材料的微小孔加工，提出了阶跃式多元变参数振动钻削新方法。
A method of ultrasonic vibration drilling is presented to the hole machining of metal matrix composites.
针对叠层复合材料的微小孔加工 ，提出了阶跃式多元变参数振动钻削新方法 。
This lays down a theoretical foundation for quick selection of right axial vibration drilling parameters and successful automatic machining of deep holes.
叠层材料是一种先进的复合材料，阶跃式变参数振动钻削新工艺最适合于加工新型叠层材料。
The laminated material is an advanced compound material. A new vibratile drilling technology with step type variable parameter is suitable IC process the new laminated material.
年日均值图显示，中期异常出现在震前11个月左右，表现为脉冲式向上突跳及阶跃式上升，最大异常量为日均正常上升速率的84倍；
The figure of daily mean value in resent year showed: the medium term anomaly with impulse jumps appeared 11 months before the event, and the maximum of anomaly was 84 times of the normal rising rate;
年日均值图显示，中期异常出现在震前11个月左右，表现为脉冲式向上突跳及阶跃式上升，最大异常量为日均正常上升速率的84倍；
The figure of daily mean value in resent year showed: the medium term anomaly with impulse jumps appeared 11 months before the event, and the maximum of anomaly was 84 times of the normal rising rate;
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