Automatic switching system for net-telephone and preset sound effect output unit and method thereof
Automatic switching system for net-telephone and preset sound effect output unit and method thereof
- CN 1,622,571 A
- Filed: 11/24/2003
- Published: 06/01/2005
- Est. Priority Date: 11/24/2003
- Status: Abandoned Application
- EN CH
-
- Pin
