Алмазан нунтаглах дугуйны давуу тал ба хэрэглээ
Most of the industrial diamonds are used to make abrasive tools. The hardness of diamond is particularly high, which is 2 times, 3 times and 4 times that of boron carbide, silicon carbide and corundum respectively. It can grind extremely hard workpieces and has many advantages. Some of its applic...
АВАРГЫН БАЛГАСААС ШИНЭЭР ОЛДСОН ДАРХНЫ ЗУУХ
This ground furnace was used in the second half of XIII century or 1225-1295 cal AD (2σ: IAAA-150907). Some of important data to confirm the last product producing in the furnace found close to the site as iron knife, ingot and nails. Consequently, a part of small vase which has cold (Au-76%), and silver (Ag-13%) adhesion in the inner side is ...