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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...
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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 ...
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