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Search: copper patina 铜绿氧化, weathered copper 风化铜面, verdigris texture 铜绿纹理, oxidized metal 氧化金属, patina metal texture 金属包浆纹理, old copper surface 旧铜表面

Avoid: metal repair 金属维修, rust removal 除锈, chemical cleaning 化学清洁, corrosion safety 腐蚀安全, scrap metal 废金属, construction metal 建筑金属, buying copper 购买铜材