ail forever . We will provide a prompt solution. We also , offer the most convenient and efficient spare parts support with competitive price. 2. What is the delivery time?The delivery time is usually within 15 workdays after we received your prepayment. 3. Do you provide customized service? Yes. We offer customized service as you need for the performance , included special requirements . 4. What is the payment method?By TT ,L/C at sight and Trade Assurance , etc. 5. Why us ?We guarantee pr