If you have made a continuous rotary drilling rig drilling drill rod function, can be equipped with hydraulic grab or continuous milling wheel construction. If the secondary rope winch with automatic release function, optional percussion drill bit and drilling large diameter drill GRABBING pebbles or boulders. If equipped with gas chambers and faucets can be gas-liquid drilling. If equipped with dual power head or rub into the casing pipe drilling machine can be, which is to solve the flow of sand, crushed gravel, silt layer effective construction method. In order to increase the carbon content of the workpiece surface and get some carbon concentration gradient, the workpiece on carburizing medium heat insulation, the carbon atoms into the surface chemical treatment process, known as carburizing. Carburizing machinery manufacturing industry is currently the most widely used chemical heat treatment process. After carburizing low carbon steel hexagonal hollow steel, high carbon surface into a hollow steel, while the heart is still low carbon Ministry hydraulic drill rod material, after quenching and tempering, the surface layer to obtain high hardness, high wear resistance and fatigue resistance, and heart Ministry remains sufficient strength and toughness. This is an ideal state of the mechanical parts. Therefore, the mechanical parts in order to obtain a high surface hardness, high contact fatigue strength and bending fatigue strength, high impact toughness, the usually carburizing process. Hydraulic Rod material _ Drilling Ltd. Shandong Peng Rui (Certified) _ hollow steel drill by Shandong Peng Rui Technology Limited. Drilling Ltd. Shandong Peng Rui (www.zbpengrui.com) Shandong Zibo, metal cutting class leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Shandong Peng Rui Drilling Ltd. led the staff warmly welcome all inquiries negotiations to create Shandong Peng Rui Drilling Ltd. a better future.