Research Progress of Ultrasonic Drilling Instruments and the Suggestion

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doi:10.3969/j.issn.1672-7428.2010.09.006

2010 No. 9

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Research Progress of Ultrasonic Drilling Instruments and the Suggestion[J]. DRILLING ENGINEERING, 2010, (9): 22-26. doi: 10.3969/j.issn.1672-7428.2010.09.006

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Research Progress of Ultrasonic Drilling Instruments and the Suggestion[J]. DRILLING ENGINEERING, 2010, (9): 22-26. doi: 10.3969/j.issn.1672-7428.2010.09.006