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The Portable XRF Gun
November 2012 by Chris Ralph

Ask The Experts: Could you expand on your previous blasting article?
Q: Could you write more about the last two methods that you mentioned—the expanding chemical mixtures and the micro blasters, how and when to use them, and when not to use them?
Ask the Experts: Something for everyone...
Q: Can you suggest some family and dog friendly vacation spots in California where I can also do some sniping?
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Q: How do metal detectors work around precious metal ore bodies?
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Designing my own dredge...
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