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Uploaded by a220998book on Apr 22, 2010
俗話說真金不怕火煉 事實上純度夠的銀也依樣不怕火煉市面上許多飾品多為廉價合金製造多含鉛錫鎳等重金屬長期接觸恐造成身體的傷害或過敏等症狀不可不慎何為真正的純銀請看影片 用火燒到紅 冷卻後依然一片銀白
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