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Technological process of making coin with multiple-surface concealed engraving
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Year of Publication 22.07.2009
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Process for manufacturing copper or iron ore series of noble metal commemorative coins or medals and dies used thereby
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Year of Publication 24.11.2010
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Production technology of silver plate inlaid with gold and combined die for same
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Year of Publication 24.11.2010
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Year of Publication 24.11.2010
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