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theoretical analysis of rock breaking technology with diamond composite coreless bit.
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Influence of drilling parameters of diamond composite arc angle bit on ROP
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Performance requirements of wireline drill pipe measured while drilling
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Introduction of five characteristics of wireline drill pipe reamer
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Safety precautions for underground drilling in non coal mines
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Time of issue:2019-12-12 00:00:00
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Time of issue:2019-10-24 00:00:00
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