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测定镜质体反射率的显微镜光度计技术条件
Technical conditions of microscope photometer for vitrinite reflectance determination
价格:¥0.00
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石门揭穿突出煤层震动爆破技术条件
The technical specification in driving the cross-cut an outburst seam by the concussion blasting method
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石门揭穿煤与瓦斯突出煤层程序技术条件
Technical specifications of the procedures for exposing outburst seams by a crosscut
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煤巷掘进工作面超前钻孔防突措施技术条件
Technical specification of outburst prevention by advance degassing holes in coal roadway drivage face
价格:¥0.00
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煤和岩石单向抗压强度及软化系数测定方法
价格:¥0.00
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