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3363705, |
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3461981, |
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Process for retrieving a coring barrel comprising two tubes and retrieving device for such a process |
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Jun 05 1985 |
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Fixing mechanism for a wireline core barrel of core drilling equipment |
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Nov 24 1987 |
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Differential pneumopercussive reversible self-propelled soil penetrating machine |
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Jan 06 2009 |
BOART LONGYEAR MANUFACTURING AND DISTRIBUTION INC |
Spearhead |
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BOART LONGYEAR MANUFACTURING AND DISTRIBUTION INC |
Spearhead base |
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BOART LONGYEAR MANUFACTURING AND DISTRIBUTION INC |
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