Pre-sales support for most sales services, to provide customers with solutions and introductions, etc., is the work done before the sale,
After the sale, you need to provide customers with relevant training, to provide technical services for their application, if the use of the problem, but also need to help you help customers solve the problem.
Technical support for technical knowledge and interpersonal communication skills are required to work relative to the technical research and development job and marketing and sales job professional requirements are not high. Need to learn more specialized related equipment, instrumentation training, only their own books are not enough.