一个用c#制作小型简易计算器的代码，实现基本的加减乘除操作。
A small simple calculator code produced by c#, to achieve the basic arithmetic operations. (2013-12-15, WORD, 19KB, 下载3次)
暖通冷凝器计算的excel表格计算文档，比较实用
HVAC condenser calculation excel spreadsheet documents, more practical (2013-06-27, WORD, 4KB, 下载14次)
应用CASIO计算器编写的程序完成工程上的一些计算，以方便及简化工作，希望对大家有用。
CASIO calculator application procedures for the preparation of the completion of works on some basis, to facilitate and simplify the work, in the hope that useful to everyone. (2009-02-06, WORD, 431KB, 下载4次)
4路抢答器，具有锁存与声音和LED显示功能。
Answer 4-way, and has a latch with the sound and LED display. (2008-11-28, WORD, 100KB, 下载15次)