... Concrete pump HBT70CIII 1,double-cylinder,beautiful design 2,moving conveniently,washing easily 3,big aggregate Comprehensive introduction about concrete pump ... HBT70CIII1,It is the "improved" product and double-cylinder standard concrete pump with diesel engine power and the cost is ... them corroded,enlarge the main oli cylinder and water pump,radiator above,pumping big aggregate which is less ...