Results showed that Mn contents and the ratio of copper to zinc in tealeaf were respectively positive correlation with its growth soil.
结果表明，茶叶中锰含量、铜锌比与土壤中对应的锰含量、铜锌比存在着一定的相关性。
In producing Mn Si alloys with hot furnace, feeding ratio of s? Mn is regulated, and slag amount and pH value are controled.
介绍了电炉生产锰硅合金时，合金中硫含量随所用原料硫含量变化的情况。
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