List of manufacturers of permissible equipment and explosion-proof accessories, as of January 1, 1930 / by L. C. Ilsley.
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Format: | Government Document Book |
Language: | English |
Published: |
[Washington, D.C.?] :
Dept. of Commerce, United States Bureau of Mines,
1930.
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Series: | Information circular (United States. Bureau of Mines) ;
6222. |
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