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10/30(Fri)
Newly Unearthed Salt-Producing Site
Song Chol, Researcher, Academy Of Social Sciences
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10/30(Fri)
Recycling Technology for Aluminum Wastes
Kim Hyon Song, Lecturer, Grand People`s Study House
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10/30(Fri)
Technology for Developing Communication Conversion Device
Assoc,Prof. Kim Sung Jong, Pyongyang University of Publication and Printing Industry