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BG45802A1
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Method for processing and heat- processing of corpus of drilling rocks instruments
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DD160166A3
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Geological practice to measure the transferability and process for the production thereof
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US3659656A
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Arrangement for slide-tracking of a boring machine in mines with a limited profile
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US3664486A
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Lifting prop for a transfer conveyor
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GB1255912A
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Improvements in or relating to spattering apparatus
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Supporting means for a mobile percussive rock drill for carrying out cylindrical cuts
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CA884179A
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Supporting means for a mobile percussive rock drill for carrying out cylindrical cuts
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