Drilling continuous drainage technology的意思|示意
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钻孔连续排水技术
Drilling continuous drainage technology的网络常见释义
钻孔连续抽放技术 ...钻孔连续抽放技术；水力冲孔与压风吹孔技术 [gap=674]ywords: large inclination thick coal seam in; Back tu plan; Huainan mining area; Drilling continuous drainage technology; Hydraulic punching and pressure the wind hole technology ..