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self-rescue of miners
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self-rescue of miners
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工学
矿工自救
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self-rescue of miners
矿工自救
矿井发生瓦斯煤尘爆炸、煤与瓦斯突出、火灾、水灾、冒顶等重大灾害事故时,灾区矿工为避免伤亡而主动自主地采取的自身救治、等待救援的技术措施。
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screwpine family
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screw spindle type turning gear
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screw theory
screw thread artefact
screw thread metrology technique
screw thruster
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