Number | Name | Date | Kind |
---|---|---|---|
3356469 | Stephenson et al. | Dec 1967 | |
4111755 | Ban et al. | Sep 1978 |
Number | Date | Country |
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249170 | Mar 1926 | GBX |
Entry |
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The Sulfurtain Process: Trapping Out Sulfur Dioxide While Burning Pulverized Coal by Buttermore, Coal Age, 1975, pp. 148, 149. |