The research group with Doc. Associate Prof. Ri Jae Myong, head of Department of the Resources Probing Engineering Faculty as the project leader developed to complete a diamond crown and succeeded in realizing it as products.
They made success in the lab research on the diamond crown which is used as the rock crushing tools in the field of drilling. Not satisfied with this, they conducted the test of performance and introduction on several occasions in several sites including the construction sites of power stations to solve scientific and technological problems that can increase the length and speed of drilling to a great extent as compared with the imported ones.
By dint of their efforts, they can be able to firmly ensure the production of the diamond crown at home which was formerly relied on import.