Preliminary Study on Construction Crafts of CJ-130 Two-way Pneumatic DTH

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doi:10.3969/j.issn.1672-7428.2009.11.018

2009 No. 11

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Preliminary Study on Construction Crafts of CJ-130 Two-way Pneumatic DTH[J]. DRILLING ENGINEERING, 2009, (11): 65-68. doi: 10.3969/j.issn.1672-7428.2009.11.018

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Preliminary Study on Construction Crafts of CJ-130 Two-way Pneumatic DTH[J]. DRILLING ENGINEERING, 2009, (11): 65-68. doi: 10.3969/j.issn.1672-7428.2009.11.018