Development of DZ-200 Multi-functional Drill and the Application in Shallow Buried Pipe Construction

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doi:10.3969/j.issn.1672-7428.2010.09.008

2010 No. 9

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Development of DZ-200 Multi-functional Drill and the Application in Shallow Buried Pipe Construction[J]. DRILLING ENGINEERING, 2010, (9): 33-36. doi: 10.3969/j.issn.1672-7428.2010.09.008

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Development of DZ-200 Multi-functional Drill and the Application in Shallow Buried Pipe Construction[J]. DRILLING ENGINEERING, 2010, (9): 33-36. doi: 10.3969/j.issn.1672-7428.2010.09.008