The ore structure of Daling Mine is complex in Jilin Nickel Industry Corporation, it is typical low grade difficulty mining deposit.
吉林镍业公司大岭矿矿岩结构复杂，为典型的低品位难采矿床。
The Mengxing Pb Zn deposit with low ore grade and deep buried is facing the situation of resources exhausted.
勐兴铅锌矿矿石品位低、埋深大，且面临资源匮竭。
The resources of natural rutile in our country is primary low-grade ore, eclogite-type rutile deposit is characterized as large, thick ore body, easy to exploration and mining.
我国天然金红石资源绝大部分为低品位的原生矿石，榴辉岩型金红石床具有规模大，矿体厚，易于勘探和开采等特点。
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