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| Domestic Power Coals (1) |
| Germanium Tetrachloride Extraction (1) |
| Microbial Bioleaching (1) |
| Rare Metals (1) |
| Sulfur-Oxidizing Bacteria (1) |
| Waste of Lead-Zinc Production (1) |
| Domestic Power Coals (1) |
| Germanium Tetrachloride Extraction (1) |
| Microbial Bioleaching (1) |
| Rare Metals (1) |
| Sulfur-Oxidizing Bacteria (1) |
| Waste of Lead-Zinc Production (1) |