DZ T 0057-1993 《水文水井钻探钻粒钻头》.pdf

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DZ 2.1-1987 地质钻探金刚石钻头.pdf

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DZ T 0056-1993 《水文水井钻探三牙轮钻头》.pdf

DZ T 0057-1993 水文水井钻探钻粒钻头.pdf

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MT T 789-2011 煤田钻探金刚石取心钻头.pdf

DZ T 0055-1993 《水文水井钻探硬质合金钻头》.pdf

MT T 789-1998 煤田钻探金刚石取心钻头.pdf

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