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.
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.
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.
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