Providing users with better performance, better quality instruments and more professional and thoughtful services has always been the goal of Bettersize. International service engineer Alvin Wang adheres to Bettesize's "professional, rapid, enthusiastic and thoughtful" service concept to arrive Vietnam VNDAT company and conduct the Nanoptic 90 instrument commissioning,training and maintenance. Bettersize's instruments perfectly interpret the accuracy and reliability of the instrument during the testing of DUKE standard samples, and the same time confirm the stability of the customer's process and product.