without sulfur dioxide pollution
The study on zinc sulfide and manganese ores leaching together,without sulfur dioxide pollution,brief in the production technological flow and lower in the yield cost,is of great significance for the exploitation of the Zinc and manganese resources.
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without sulfur dioxide pollution
没有二氧化硫污染
以上为机器翻译结果,长、整句建议使用 人工翻译 。