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【摘 要】
：
In natural environment,tamish was observed on the surface of historic and contemporary gold coins in several countries.Few years after the emergence of panda go
【机 构】
：
State Key Laboratory of Fine Chemicals,Electromechanics & Materials Engineering
【出 处】
：
稀有金属（英文版）
【发表日期】
：
2004年期
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