manganese concentration是什么意思 manganese concentration怎么读
manganese concentration的相关资料
manganese concentration的用法和样例
- A black mineral consists of basic manganese oxide.
一种黑色矿物,由基性氧化锰组成。 - Manganese has the seine effect on the strength of steel as silicon.
锰对钢的强度的影响和矽相同。
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