Q1:Is your company a factory or a trading company? 
Q2:What is your company's main products? 
Q3:What standard of your equipment produce? 
Q4:How do you ensure that the product is of good quality? 
Q5:Where are you located? Is it convenient to visit you? 
Q6:Can you design the product according to our requirements? 
Q7:What's the delivery time for sample order? 
Q8:How to maintain surge protection? 
Q9:Working principle of SPDs 
Q10:Any Difference of the installtion? 