underground gold detector
地下金银探测仪 金银探测器批发 | Underground gold detector 地下金银探测器 金银探测仪价格 | Underground gold detector ..
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underground gold detector
地下黄金探测器
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He told Australian media the prospector had been using a state-of-the-art metal detector, which meant he was able to find the gold relatively deep underground in an area which had been searched many times in the past.
BBC: The gold nugget found in Ballarat