CadCam BBS
http://www.bnu.edu.cn/bobbychen/BBS/ѧÊõ¿Æѧ/Circuit.html/Circuit.AIX/00000002/index.htm
http://www.zhanjiang.gd.cn/personal/thw/
Perter
http://siemens.163.net/eda/state5.zip.asc
Franck
http://www.zhanjiang.gd.cn/personal/thw/cad9904.htm
Semens
http://siemens.163.net/eda/syn514p.zip.asc
http://ils.wzptt.gx.cn/whorse/design.htm
http://www.zhanjiang.gd.cn/personal/thw/ecad9805.htm
http://202.96.140.52/personal/thw/cad/
http://www.cis.scu.edu.tw/~lab/