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American standard safety rules for installing and using electrical equipment in and about coal mines (M2.1) /Sponsors, American Mining Congress and U.S. Bureau of Mines.
| Year: | 1964 |
|---|---|
| Document Type: | USBI |
| Issuing Agency: | Bureau of Mines, |
| SUDOC: | I 28.27:8227 |
| Series: | Information circular / United States. Bureau of Mines ; |
| Report Number: | 8227 |
| Subject: | Coal mines and mining--Safety measures |
| Link: | https://hdl.handle.net/2027/mdp.39015078514398 |
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