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5211985 | Shirley, Jr. et al. | May 1993 |
Number | Date | Country |
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38 08 277 A1 | Sep 1989 | DE |
0 332 929 B1 | Sep 1989 | EP |
1508777 | Apr 1978 | GB |
9306941 | Apr 1993 | WO |
Entry |
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Uhlemann, Chem.-Ing.Technik, 62(1990), pp. 822-834. |