Training institutions and vocational schools. There are many training institutions and vocational schools in Zhangjiagang that can provide CMM-related training courses. These include Zhangjiagang Nantong Vocational Education Center, Zhangjiagang Campus of Jiangsu Vocational College of Arts and Crafts, and Zhangjiagang Vocational and Technical Training Center. Three-coordinate, also known as three-dimensional coordinate measurement technology, is a technology that uses three-dimensional coordinate system to accurately measure objects.