STAS 12720 4-1989 Equipment for hydrogeological drilling BIT COLLARS FOR COUNTER FLUSH DRILLING BY ABSORPTION OR AIRLIFT Dimensions《水文地质钻探设备 吸收或空气提升反冲洗钻探钻头颈圈质量技术要求 》.pdf

相关资源

DZ 2.1-1987 地质钻探金刚石钻头.pdf

CSN ON 22 0891-1963 《切割板用于牙冠钻头（钻探）》.pdf

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

DZ T 0057-1993 《水文水井钻探钻粒钻头》.pdf

DZ T 0056-1993 水文水井钻探三牙轮钻头.pdf

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

DZ T 0277-2015 地质岩心钻探金刚石钻头.pdf

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