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Trotliners aid
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Fish lure desnagger
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Bit weight maintainer for marine earth boring
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Axial flow turbine drill for earth boring
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Animated fishing lure and child's toy
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Pulsation suppressor
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Coring drill
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Drilling bit
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Well drilling fluid and a method of using same
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Method and apparatus for core orientation
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Combination drilling bit
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Drilling bit
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