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一些电脑系统常用知识如怎样彻底删除文件，dos下系统备份等-Some knowledge of computer systems commonly used documents, such as how to completely delete, dos, such as under the system backup

谐波源发生器 PSCAD DEMO 可以使用(Harmonic source generator PSCAD DEMO)

说明：  e suna archivo para que me djen descarar alv

说明：  输入1-13中的四个数，输入要计算的值（24点游戏就输入24），计算机穷举法给出计算公式(Enter the four numbers 1-13, enter the values ​ ​ to be calculated (24-point game on the importation of 24), the computer gives exhaustive formula)

一款专业的电话交换机计费管理系统，可适用于任何行业。-A professional telephone exchange billing management system, applicable to any industry.

Oracel9i在windows下的安装及配置方法-Oracel9i in the windows of the installation and configuration method

一个上工具，用于修改部分程序的。呵呵，有兴趣的可以下来看下，很好用的。-One on the tools for the amendment of part of the procedure. Oh, who are interested can down facie, very good use.

模拟自由曲面面型，对光学设计人员很有帮助(Analog freeform surface)

打字 五笔_英文打字练习软件源码 帮助学习交流工作经验 -Wubi _ English typing practice typing software source code to help study and exchange of experience

内存优化工具， 只需要在exe上加上此动态库就可以(Memory optimization tools only need to add this dynamic library to the exe)