SIS 74 13 55 E-1969 Core drilling equipment Double-tube core barrels type T Bottom-discharge and swivel type Lower end of inner tube《钻芯设备 双管岩芯桶,T型,底部 卸载和旋转型,内部管子的底部》.pdf

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SIS 74 13 55 E-1969 Core drilling equipment Double-tube core barrels type T Bottom-discharge and swivel type Lower end of inner tube《钻芯设备 双管岩芯桶,T型,底部 卸载和旋转型,内部管子的底部》.pdf_第1页
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