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>> No.58189350 [View]
File: 22 KB, 480x640, 1332819456_bar3.jpg [View same] [iqdb] [saucenao] [google]
58189350

>>58189327
>just acoustically test your bars with ultrasonometry. gold with tungsten in it is easy to detect

Not a precise science, a mixed bar will throw off a detector

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