... functions of self-driving,pumping and distributing HBJ80-22 boom pump is a new special equipment developed by our company according ... and distributing,with the characteristics of simple and occasions of concrete pumping and pouring constructions,such as precast beams,tunnel,bridge ... wayside facilities so forth.Main features of HBJ80-22 boom pump :1,Chassis adopts mature drive axle of wheel excavations, ...