343 resultados para Electric prospecting


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"Including reprints from The Statist, The Engineer, etc.

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Mode of access: Internet.

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Description based on: 1896.

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Geological Survey Bulletin 1000-F.

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Industrial arts index

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Item 429-T-11.

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Mode of access: Internet.

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"Contract AT(30-1)-2789."

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An electrical discharge is used as a trap for a diffusion pump using DC-704 silicone pump fluid. The discharge cracks the pump fluid vapor thus taking it out of the system. In the process much hydrogen and some other lighter gases are evolved.

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"Issued May 1981."