轻型潜孔钻造孔、分段栓塞式帷幕灌浆施工工艺
경형잠공찬조공、분단전새식유막관장시공공예
The Technology of Drillingf a Borehole by Using a Light Type Down-the-hole Drill and Packer Curtain Grouting for Construction of Jufudu Hydropower Project
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