Trial Discussion on Safety of Drilling with wire Coring in Coal FieldJ. COAL GEOLOGY & EXPLORATION, 1986, 14(6): 66-68.
Citation: Trial Discussion on Safety of Drilling with wire Coring in Coal FieldJ. COAL GEOLOGY & EXPLORATION, 1986, 14(6): 66-68.
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Trial Discussion on Safety of Drilling with wire Coring in Coal Field

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