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GB1263965A
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Improvements in or relating to core drilling apparatus for use in earth boring
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US3340939A
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Core lifter apparatus
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US3333647A
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Wire line core barrel
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US3305033A
|
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Core barrel
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US3199907A
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Underground wire line core barrel apparatus
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US3303897A
|
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Underground water swivel apparatus
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US3103981A
|
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Wire line core barrel
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FR1238977A
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Coring device
|
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GB860555A
|
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Improvements in apparatus for core drilling in earth formations
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US3120283A
|
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Underground wire line core barrel apparatus
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US3120282A
|
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Wire line core barrel improvements
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FR1207445A
|
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Cable-operated sprue cylinder
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GB816271A
|
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Improved rotary core drill
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GB812039A
|
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Core barrel improvements
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US2837314A
|
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Apparatus for deflecting bore holes
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GB752869A
|
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Improvements in or relating to apparatus for taking core samples from earth formations
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US2857138A
|
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Core barrel
|
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US2829868A
|
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Wire line core barrel
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US2792198A
|
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Portable drill rig
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US2710700A
|
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Shaft mucking apparatus
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