1. Professional:Excellent technical skills,and professional knowlege on products and applications;
2. Eventually: Answer swiftly, just in case of failure to mend, deliver answers within 24 hours;
3. Responsibility:Dereike promises 18 months free warranty time and a lifetime maintenance;
2. Eventually: Answer swiftly, just in case of failure to mend, deliver answers within 24 hours;
3. Responsibility:Dereike promises 18 months free warranty time and a lifetime maintenance;