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[DZ/T 0002.3-1997] 含煤岩系钻孔岩芯描述标准--岩性岩类部分[已作废]
发布时间：1991-10-01
实施时间：1991-10-01
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[DZ/T 0002.4-1997] 含煤岩系钻孔岩芯描述标准--煤岩煤相部分[已作废]
发布时间：1991-10-01
实施时间：1991-10-01
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