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New soil acidity measuring instrument developed
  The South Hwanghae Provincial Posts and Telecommunications Management Bureau developed a new soil acidity measuring instrument of Korean style.
  The instrument is popular among users as it has new measuring principle, program, structural device and quality yet convenient use and high accuracy as against the previous one.
  It was highly estimated at the 37th National Sci-Tech Festival. Since it can measure even the acidity of solutions of all kinds as well as that of soil, it is widely introduced into agriculture and different other sectors of the national economy.