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煤矿用网路闭锁发爆器
Network blocking exploders for coal mines
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瓦斯抽放用热导式高浓度甲烷传感器
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矿用防爆电磁阀通用技术条件
General specification of explosion-proof electromagnet valves in coal mine
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煤的截割阻抗的测试方法
Measurement and test methods of cutting resistance for coal
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充气式钻孔瓦斯涌出初速度.测定装置技术条件
Technical condition about inflatable device for determining initial velocity of gas emission from boreholes
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电子等容式瓦斯解吸仪技术条件
Technical condition about the electronic instrument determining gas desorption index with equating volume principle
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矿用风门开闭状态传感器通用技术条件
General spacifications for air door switching motion transducer in mine
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滚筒采煤机 型式和基本参数
Shearer-- Types and basic parameters
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煤矿乳化液泵站用自动卸载阀试验规范
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