There is high tantalite grade for certain large scale granite - pegmatite pattern tantalite - columbite mine in our country.
我国某大型花岗伟晶岩型铌钽矿含钽品位高居我国钽铌矿山之首.
互联网
Eluvial tantalite: Eluvial tantalite is found in rubble consisting of fragments and pebbles of varied composition.
残积层钽铁矿: 残积层钽铁矿发现于由碎片和小鹅卵石成分的碎矿中.
互联网