... Integrating functions of self-driving,pumping and distributing HBJ80-22 boom pump is a new special equipment developed by ... piers,wayside facilities so forth.Main features of HBJ80-22 boom pump :1,Chassis adopts mature drive axle of ... the designated location for high viscosity concrete.3,The 22 meters boom first time adopts four arms Z-type ... lock to prevent leakage of oil cylinder. HBJ80-22 boom pump