| |||
baierine; baierite; dianite; ferrocolumbium; ferroilmenite; hermarmolite | |||
columbite ((Fe, Mn)(Nb, Ta)2O6); ferrocolumbite ((Fe, Mn) Nb2O6); niobite ((Fe, Mn)(Nb,Ta)2O6) | |||
mengite; greenlandite | |||
niobite | |||
columbite; ferrocolumbite |
铌铁矿 : 34 phrases in 6 subjects |
Chemistry | 1 |
Ecology | 1 |
General | 14 |
Metallurgy | 12 |
Steel production | 1 |
Technology | 5 |