Author: Harold Putnam GreenwaldPublisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 30
Book Description
Tests of Salt as a Substitute for Rock Dust in Prevention of Coal-dust Explosions in Mines PDF Download
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Author: Harold Putnam GreenwaldPublisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 30
Book Description
Author: Harold Putnam Greenwald
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Author: United States. Bureau of Mines
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