heavy duty drill rod 重型钎杆
heavy-duty drill rod 重型钎杆
heavy-duty rock drill 重型凿岩机
heavy-duty jobber length drill 重型长钻头
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It is used to drill heavy duty pretension anchor holes at side slope of water power station, railway or highway projects, as well as drainage holes.
适用于水电站铁路公路边坡大吨位预应力锚固孔排水孔的施工，以及预防滑坡岩石坍塌等地质灾害治理工程。
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