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six mine safety refuge systems
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矿山安全避险六大系统
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six mine safety refuge systems
矿山安全避险六大系统
地下矿山安全避险的矿井监测监控系统、井下人员定位系统、井下紧急避险系统、矿井压风自救系统、矿井供水施救系统和矿井通信联络系统。
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