Scientists of the institute of control instruments invented and introduced various highly efficient and handy control devices, thus raising the level of the modernization of large-scale machine tools.

The mechanical engineering institute developed an oxygen generator for medical treatment, making a reasonable method to fully produce and provide high purity oxygen for contributing to the treatment.

The branch institute of railway science increased the usage of new brakes for passenger and freight trains than ever.

Teachers and researchers of Kim Il Sung University and Kim Chaek University of Technology invented new technologies such as a method of making insecticide and its use and a method of making photo catalyst coating liquid for air-conditioning. They are drawing interests for their high practical values in improving the works for forestation and hygienic environment.

Inventions have been made in construction sites of dwelling houses in Pyongyang.

Lots of technical innovation proposals were applied to ensure the speed and quality in bedding and structuring skyscraping buildings and constructing public buildings and improve construction of elevators and heating system and the greening.

The Taean Heavy Machine Complex, the February 8 Vinalon Complex, the Hungnam Fertilizer Complex and other units made technological innovations of high practical values, contributing to increased production.