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ES359217A1
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A procedure for the treatment of solid materials, especially of mineral origin. (Machine-translation by Google Translate, not legally binding)
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GB899972A
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Improvements in or relating to snow substitutes for summer skiing
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US3066580A
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Ski surface and process of forming same
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US2961399A
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Method for neutralizing obnoxious radiation
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US2932745A
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Standard radiation-resistant building block
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DE1084465B
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Molded stone for radiation protection walls to be put together loosely for handling radioactive isotopes
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