1. Professional:Excellent technical skills,and professional knowlege on products and applications;
2. In time :Respond quickly,in case of failure to repair,provide solutions within 24 hours;
3. Task: Dereike promises 18 months free service warranty opportunity as well as a life time upkeep;
2. In time :Respond quickly,in case of failure to repair,provide solutions within 24 hours;
3. Task: Dereike promises 18 months free service warranty opportunity as well as a life time upkeep;