| ORIGINAL PRINTED PATENT APPLICATION NUMBER 6,267 FOR APPARATUS FOR ELECTRO-MAGNETIC SEPARATION. (1909) | Hardcoverby Ferdinand & Heinrich Stein (inventors). Steinert (Author)
| 1 Used starting at: | $35.00 |
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| | Binding: | Hardcover | | Publisher: | HMSO | | Publication Date: | January 01, 1909 |
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