An opening ceremony took place at the Sci-Tech Complex on Aug. 6.

Attending the presentation and exhibition were teachers, researchers, field officials and three-revolution team members from 30-odd units, including the Ministry of Local Industry, the State Academy of Sciences, Pyongyang Han Tok Su University of Light Industry, Hamhung University of Chemical Engineering, etc. And over 400 papers and at least 1 500 exhibits were presented there.

During the exhibition, a lecture and video show will be arranged.

The presentation and exhibition will go on till Aug. 9.