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            Customer service

            Usage method

            When selecting the screw drilling tool for operation, the specification and model of the drilling tool shall be selected according to the well size, required drilling trajectory, bottom hole temperature, bit requirements...

            Product introduction

            PDM drill is a kind of positive displacement downhole power drill which takes drilling fluid as power and converts the liquid pr
            国产AⅤ青青无码,最刺激的乱惀小说交换,国产ChineseHDXXXX老太婆

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