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replacing brattice cloth at coal faces with air curtains and diffuser fans, a preliminary study /
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| Main Author: | |
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| Corporate Author: | |
| Other Authors: | , |
| Format: | Unknown |
| Language: | English |
| Published: |
Washington, D.C. :
U.S. Dept. of the Interior, Bureau of Mines,
1975.
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| Series: | Report of investigations (Unites States. Bureau of Mines) ;
8052. |
| Subjects: | |
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| Physical Description: | 8 p. : ill. |
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