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Drillability Determination
Sathit TandanandHarold F. Unger
其他書名
A Drillability Index for Percussion Drills
出版U.S. Department of the Interior, Bureau of Mines, 1975
URLhttp://books.google.com.hk/books?id=hY17Hr_V7PAC&hl=&source=gbs_api
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