• 云母不仅是矿源层,而且还是赋矿围岩

    Two mica schists are considered to be the source bed and host rock of gold.

    youdao

  • 云母不仅是矿源层,而且还是赋矿围岩

    Two mica schists are considered to be the source bed and host rock of gold.

    youdao

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