THE METHOD OF HARD COAL ENRICHMENT AND THE SET OF EQUIPMENT FOR MECHANICAL SEPARATION OF HARD COAL

• 1. 一种硬煤防冲卸压钻孔施工方法及设备 [P] . 中国专利： CN107023295B . 2021.05.28
• 2. 坚硬煤层、坚硬岩层水平深钻孔CO₂致裂安全控顶方法 [P] . 中国专利： CN113090264A . 2021-07-09
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  机译： 硬煤富集方法及机械分离硬煤的成套设备

• 4. METHOD FOR ENRICHING HARD COAL AND COAL AND A DEVICE FOR ENRICHING HARD COAL [P] . PL161890B1 . 1993-08-31

  机译： 硬煤和煤的富集方法及硬煤的富集装置

• 5. METHOD FOR ENRICHING HARD COAL AND COAL AND A DEVICE FOR ENRICHING HARD COAL [P] . PL281492A1 . 1991-03-25

  机译： 硬煤和煤的富集方法及硬煤的富集装置

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