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Mitigating destructive longwall bumps through conventional gate entry design /

I tiakina i:
Ngā taipitopito rārangi puna kōrero
Ētahi atu kaituhi: Campoli, A. A. (Alan A.)
Hōputu: Tē mōhiotia
Reo:Ingarihi
I whakaputaina: Pgh. [i.e. Pittsburgh] PA : United States Dept. of the Interior, Bureau of Mines, 1990.
Rangatū:Report of investigations (United States. Bureau of Mines) ; 9325.
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