Effort has been made on two main continuous ore-drawing and haulage systems and prominent technical and economic benefit have been achieved in China during the past ten years.

 
  • 我國經(jīng)過(guò)近十年的努力,研究試驗了兩種采場(chǎng)連續出礦運礦的技術(shù)路線(xiàn),并取得了顯著(zhù)的技術(shù)經(jīng)濟效果。
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