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Plate ash dish is an advanced fire assay in foreign countries. Advanced gold testing institutions in Europe and the United States as well as precious metal testing institutions in Hong Kong, Macao, Taiwan, Singapore and other places use the plate gray
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Plate ash dish is an advanced fire assay in foreign countries. Advanced gold testing institutions in Europe and the United States as well as precious metal testing institutions in Hong Kong, Macao, Taiwan, Singapore and other places use the plate gray democracy

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