difficult dressing是什么意思 difficult dressing怎么读
difficult dressing的用法和样例
- It is difficult to concentrate for Arsenical gold Mineral.
含砷金矿属难选矿石。 - Primary gold ore from Bangi, Guizhou, belongs to a clastic-type, finely disseminated, refractory particles.It is difficult to extract gold from the ore by cyanide infusing.
贵州板其原生金矿石属碎屑岩类微细浸染型难选冶矿石，在氰化浸出之前需进行预处理。
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