Various mines, smelters and factories have raised the role of technicians, turning technical innovation into the work of the working masses.

The Munphyong Smeltery established a lead production method based on revolving roasting furnace to boost the nonferrous metal production with domestic raw materials and fuel.

The Taedonggang Battery Factory solved sci-tech problems for recycling old batteries by its own efforts to harness wastes for current production.

The Sangnong Mine introduced various blasting methods according to the rock conditions and raised the proportion of mechanization in the face work.

The December 5 Youth Mine is speeding up at the final stage the construction of processing base, which is of weighty significance in developing the country's basic chemical industry.