On April 17, 2008, the Yancheng Science and Technology Bureau convened the scientific and technological achievements appraisal meeting of the "Integrated Built-in High-precision Internal Grinding Machine Technology" project developed by our company in Yancheng. The meeting unanimously held that the “built-in high-precision inner-circular grinding machine technology” developed by our company is the first in the country and can achieve high-precision and high-efficiency internal grinding. The main performance indicators have reached the international advanced level, and it is recommended that our company further accelerate Transformation of scientific and technological achievements to form a series of products.