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Gold Karat Density Precious Metal Tester For Jewelry , Electronic Power2019-05-28 16:32:27 |
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Jewelry Industry Electronic Silver Purity Tester With Windproof Cover2018-08-30 18:36:02 |
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High Technic Precious Metal Tester / Gold Purity Testing Machine For Lab2018-08-30 18:36:02 |
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