Any ideas about a part of my cover letter?

This is my cover letter used to apply to a PhD degree. Could you please check it out and find out possible errors? Thanks in advance!

---------------------------------------
..................................

I have strong combination of academic and industrial experience through my work in Universities and Industry. I have over 4 years' working and teaching experience in such areas as embedded systems, network technologies and robotics and have already accumulated extensive and excellent skills in programming in C/C++ and in designing filters, controllers and network protocols. Specifically, I joined the ECE Department of Hohai Universityin in 2006 where my primary appointment is with the Communications Group, but I am also cross listed with the Embedded Systems Group. ............................

If you need more information, please check the attached CV and let me know if the information is not presented in the CV.