The microstructure and mechanical properties of a copperbearing age hardening steel were studied.
研究了含铜时效钢焊接热影响区的组织与性能。
2
The properties of zinc, lead and copperbearing polymetallic are complicated. The difference of the ore's purity is large. And there are carbon gangues in the ores.
某铜铅锌多金属矿石其矿石性质较为复杂,原矿品位差距较大,且含有碳质脉石。
3
The most common approach to extracting metal-bearing ore from a porphyry copper deposit is by open-pit mining, although such mines also typically include some underground activities.