Comparison of rotary and in-hole motor techniques for drilling horizontal boreholes in coal / by S.J. Kravits, A. Sainato, and G.L. Finfinger.
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| Format: | Government Document Microfilm Book |
| Language: | English |
| Published: |
[Avondale, Md.] :
U.S. Dept. of the Interior, Bureau of Mines,
1985.
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| Series: | Report of investigations (United States. Bureau of Mines) ;
8933. |
| Subjects: |