| 释义 |
difficult dressing
基本例句
难选
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。 |