女同互添下身视频在线观看

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      Premium Comprehensive Performance PDC Cutters C20 Series was Released

      Premium Comprehensive Performance PDC Cutters C20 Series was Released

      2020-09-16

      New Released-Premium Comprehensive Balanced Performance PDC Cutters - C20 Series



      C20 series are designed for complex formations which also request high wear resistance.  The scientific management of residual stress helps to reduce “Spall”.  The toughness of PCD layer is also highly improved. The impact resistance, wear resistance and self sharpness is well balanced for C20 series.

      C20 Series-1.png



      女同互添下身视频在线观看