女同互添下身视频在线观看

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      New Released-Premium High Impact Resistance PDC Cutters - H20 Series

      New Released-Premium High Impact Resistance PDC Cutters - H20 Series

      2020-09-29

      New Released-Premium High Impact Resistance PDC Cutters - H20 Series


      H20 series are the high impact resistance cutters which designed for drilling high impact resistance formations which request high ROP, such as conglomerate and interlayer formations.  The diamond powder of H20 is self-sharpening design.  The impact resistance is 20% better than the comprehensive performance cutters C20.  The scientific management of residual stress helps to reduce "Spall"

      H20 Series News.jpg


      女同互添下身视频在线观看