This paper deals with the PC series micro-computer software copy protection problem. 本文研究的是PC系列微机的软件防拷贝问题。
Array holes by micro EDM is the more common methods used at home and abroad, because the process of micro EDM only produces a small force, has highly copy precision and so on. 采用微细电火花技术加工阵列孔是目前国内外使用较为普遍的方法,原因是微细电火花加工方法具有宏观作用力小、复制精度高等优点。