The experimental result of the prototype indicated that the design and technology was feasible and reached the anticipated object. A new type of drilling tools has been offered.
试验结果表明，该设计方案可行，达到了预期设计目标，可为矿山钻进工程提供一种新的施工方法。
The experimental result of the prototype indicated that the design and technology was feasible and reached the anticipated object. A new type of drilling tools has been offered.
试验结果表明，该设计方案可行，达到了预期设计目标，可为矿山钻进工程提供一种新的施工方法。
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