high-quality high- elastic rigid automatically adjustable stable The six-party spiral drill pipe,twist drill pipe /spiral drill pipe/twist drilling rod  introducedThe six-party spiral drill pipe,twist drill pipe /spiral drill pipe/twist drilling rod  Spiral craft:...

1.high-quality 2.high- elastic 3.rigid 4.automatically adjustable 5.stable Twist Drill Rods/Spiral Drill Rods/Twist Drill Pipes /Spiral Drill PipesSpiral craft: prestressed wire winding and welding with single strip steel or double strip steel, based on the big torque of...

1.high-quality 2.high- elastic 3.rigid 4.automatically adjustable 5.stable coal mining drill pipe coal mining drill pipe Craft: prestressed wire winding and welding on the basis of merits from German craft. coal mining drill pipe Material: high pressure seamless alloy pipe...

1. high-quality 2.high- elastic 3.rigid 4.automatically adjustable 5.stable spiral coal mining  drill pipe spiral coal mining  drill pipe Spiral craft: prestressed wire winding and welding with single strip steel or double strip steel, based on the big torque of...

1.Using alloy material,Intensity big 2.Remove convenient,long operating life 3.Footage fast 4.Safe use 5.Sealing is reliable A,Geological exploration drill series of water introduced...

1.high-quality 2.high- elastic 3.rigid 4.automatically adjustable 5.stable The six-party spiral drill pipe,twist drill pipe /spiral drill pipe/twist drilling rod spiral drill pipe/twist drilling rod Craft: prestressed wire winding and welding on the basis of merits from...

1.high-quality 2.high- elastic 3.rigid 4.automatically adjustable 5.stable The six-party spiral drill pipe,twist drill pipe /spiral drill pipe/twist drilling rodThe six-party spiral drill pipe,twist drill pipe /spiral drill pipe/twist drilling rod Craft: prestressed wire...

1.high-quality 2.high- elastic 3.rigid 4.automatically adjustable 5.stable API water spiral  well drill rod/nq hq aw nw geological core drill rod/drill pipe / twist drill pipe/spiral drill pipesCraft: prestressed wire winding and welding on the basis of merits from...

1.high-quality 2.high- elastic 3.rigid 4.automatically adjustable 5.stable 4 wings 65 mm PDC drill bit introduction4 wings 65 mm PDC drill bit  is super hard material combined with diamond and hard alloy under high temperature. It not only has the advantages of hard...

1.high-quality 2.high- elastic 3.rigid 4.automatically adjustable 5.stable spiral mining  drill pipespiral mining  drill pipe Spiral craft: prestressed wire winding and welding with single strip steel or double strip steel, based on the big torque of geological...