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New Type Rock Mining Mills From Usa

Interesting fact Back in the 1970s the Soviet Union did try drilling a very very deep hole to see what would happen The Kola Superdeep Borehole They drilled 12 kilometers (7 5 miles) down and still didn't reach the mantle They quit when they were only 1 3 of the way down because the rock reached temperatures of 180 C (356 F)!Remember the deeper you dig the hotter it gets and that

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