Go top of the hydraulic cylinder tube unit, "Department of national patent product" The main structure consists of four parts: 
 (1) of the main part, by the two pairs to succeed, double acting hydraulic cylinder piston rod extended composition, its main characteristics and the same before and after the walking speed, the machine can either direction into the top (regardless of front and rear) to overcome the General pipe jacking machine forward and back do not have the speed, the machine hours before and after, does not require a short pole, used the flapper, the top of the machine to overcome the general section on top of each bar must be connected with a short pole, or can not be jacking. 
 (2) a hydraulic pump stations were equipped with electronic ignition and electric motors pump diesel engine pump. 
 (3) support the two boards, the role of fixed plant and support the role of working Kengbi 
 (4) top tube and pull the top into the city and head back to the role of care reaming, the aircraft features of the city for use with just the pull, the first mandrel from the road, rail or public buildings on one side (surface 1 - 5 meters) overhead, section by section across the ejector exit, and then remove the head, like the first pull on the cone, and the laying of the pipeline required termination and pull the head and tail firmly, then pull the other group using the fuel tank back care reaming, the pipeline laying success. 
 Reaming diameters up to 150mm \ 250mm \ 350mm \ 450mm \ 520mm, up to 50-70 meters away from the construction 
 Address: Bazhou City Tongda Machinery Factory hydraulic jacking. Tel :0316 -7395128 0316-7231445 
 Website: http://www.dingguanjixie.com/