After training, the client's workers can operate the trailer themselves and have a good understanding of the various functions of the trailer. 3. ANDA can provide customers with a full set of spare parts to ensure timely supply of spare parts. 4. We have professional after-sales teams in Nigeria, Mongolia and Saudi Arabia. Once there is a failure, we will help to solve the problem in time.used truck tractor trailer price website:http://www.anda-trailer.com/