A technology for producing silicon potash fertilizer with locally-available raw materials was introduced to co-op farms.

At local building-materials factories, raw material feeding process was put on an automation basis and quality of cement considerably improved.

Additives for raising combustion efficiency of fault coal were developed for production of briquette.

Meanwhile, the Pyongyang Thermal Power Complex has pushed ahead with the research to introduce new technology of firing.

Technicians of the Guidance Bureau of Passenger Service in Pyongyang concentrated their efforts on solving the technical problems to improve the quality of SR transmission gear for a new-type trolley bus.

Teachers and researchers of Kim Il Sung University established an aid system to control the water level of the Taedong River while intensifying researches to put the production and supply of drinking water on a scientific basis.

Kim Chaek University of Technology has striven to develop the technology for producing ferroalloy with domestic raw materials.

Pyongyang University of Architecture and Pyongyang Han Tok Su University of Light Industry are concentrating efforts on the development and introduction of new building method and light industrial products.