New technical things

KCNA

Pyongyang, February 20 (KCNA) Many effective technical inventions have been introduced in economic sectors in the Democratic People's Republic of Korea. The Chollima Steel Complex is keeping equipment in full-capacity operation by using a new material of electric switches.
Technicians of the complex have established new melting and heat treatment processes with copper-chrome alloy as a material of electric switches.
The Hwanghae Iron and Steel Complex has developed new stainless spring material and used it in making plate spring for piston ring of oxygen compressor. The new material makes it possible to improve the quality of plate spring and lengthen its serviceable life 10 times.
Many other factories and enterprises have also made technical inventions and introduced them in production, profiting greatly from them.