利用国产铝粉作为混粉工作液的粉末添加剂，进行混粉电火花加工试验研究。
The homemade aluminium powder was used as the additive for powder-mixed dielectric EDM and the experiments were made in the EDM-tool.
由于超声磨料混粉电火花加工是一个复杂的过程，难于建立精确的加工理论模型。
On account of the ultrasonic abrasive mixed powder EDM is a complex process, it is difficult to build a precise mathematical model of the processing.
依据正交设计原理设计的试验样本，能充分代表混粉电火花加工技术工艺系统特性；
The samples, according to Orthogonal Design principle, fully represent the systematic characteristic of PEDM.
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