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Noble metals (gold, silver and platinum group of metals: ruthenium, rhodium ,palladium ,osmium, iridium ,platinum) have many unique characteristics, such as high melting-point, excellent physical and chemical stability, and catalyst activity etc, so noble metal and the alloy have become the indispensable materials in the modern industries of temperature measurement, special kind glass found, electronic circuit, electrical contact component, catalysts for chemical industry and gas purification. |
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