Abundant nonferrous metallic, precious metallic, rare earth metallic and nonmetallic mineral resources are hosted in the Early Cambrian black rock series in south China.

 
  • 摘要我國南方早寒武世黑色巖系中,蘊藏著(zhù)豐富的有色金屬、貴金屬、稀土金屬和石煤及非金屬礦產(chǎn)。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan