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随着南非金矿日益向超深发展,已更加注意维持良好的井下工作环境,这包括必须减少井下热源和降低空气及噪声污染。这些问题促进了南非埃姆科机械制造公司开发其
As South Africa’s gold mines develop increasingly deeper, more attention has been paid to maintaining a good downhole working environment, including the need to reduce downhole heat sources and reduce air and noise pollution. These issues have prompted South Africa’s Emco Machinery Manufacturing Company to develop it