In our country, the resource of iron ore is scarce; orecontent are lean and the cost of exploitation is high.
我国是铁矿石资源贫乏国家，矿石品位低，开采成本高。
2
The leading role of tuffisitization processes in formation of diatremes, parameters and orecontent of diatremes relation to peculiarities of the magmatism manifestation are revealed.
The differences of bony orecontent of deficient kidney syndrome in both group provided a reference for differentiating the mild and severe degree of deficient kidney syndrome in clinic.