If the rotary drilling rig has done a continuous function hexagonal hollow steel, 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 drill hollow steel drill rod, which is to solve the flow of sand, crushed gravel, silt layer effective construction method. B22 rock drill and drill out the screw connection within M16 * 2 or square hollow steel teeth, length of 0.4 to 2.8 m. Anchor drill pipe length of 1 m / root, the user need other specifications can be customized. Technical Specifications Model B22 B22 drill pipe thread connection specifications M14 * 2 M16 * 2 length 0.4-2.8 B22 air drill made of high quality hollow hexagonal, made of hollow steel drill rod 55SiMnMoV heavy tail supporting a variety of hydraulic bolt rig, the head can En outside buckle various bits. Anchor bolt drill pipe connections connected sets, B22 anchor drill pipe bending and strong, durable, easy disassembly, easy to operate, can also be designed according to user requirements for processing drill anchor connected sets. Hollow drill steel drill rod hollow steel _ _ Drilling Ltd. Shandong Peng Rui Peng Rui provided by Shandong Drilling Technology Limited. Drilling Ltd. Shandong Peng Rui (www.zbpengrui.com) strong, credible, Shandong Zibo metal cutting and other industries has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Drilling Ltd. Shandong Peng Rui and you hand into the brilliant, for a better future!