In recent years, hundreds of technical inventions have been introduced into production at machine-building factories and enterprises.

The Taean Heavy Machine Complex has adopted a new technology to increase the modulus of turbine by 0.4 percent, while economizing several dozen tons of materials such as copper, silicon sheet steel and electric transformer oil.

The Rakwon Machine Complex has made scores of devices needed to expand the service span of hydraulic pump by 60 percent or more.

The Ryongsong Machine Complex has invented new models of planing machine and screw-cutting lathe for the purpose of making precision compressor accessories and raising the processing speed as much as tens of times.

Similar successes have been made at the Ranam Coal Mining Machine Complex, the Pyongyang 326 Electric Wire Factory, the Kusong Machine-tool Factory and so on, so that their production processes have been updated.