Click image to view original image
Welcome to wholesale spiral geological drill rod from us, we always have cheap products to offer you.
Geological spiral drill rod
Spiral craft: prestressed wire winding and welding with single strip steel or double strip steel, based on the big torque of
geological drill rod.
Material of rod body: geological alloy pipe
Material of connector: first-class alloy constructional steel
Craft: thermal refining in vacuum, which greatly improves the fatigue resistance and shearing strength.
Rod body craft: friction welding, which improves the bending strength and the firmness of the drill rod.
http://www.pdcoiltool.com
