What are the specifications of concrete pump trucks in terms of length?

[OJames]

The body length of concrete pump trucks varies depending on different brands and types. There are seven common specifications for pump truck lengths: 21 meters, 24 meters, 28 meters, 30 meters, 33 meters, 38 meters, 35 meters, and 37 meters. Initially, domestically produced boom-type concrete pump trucks mostly had boom lengths of 37 meters, but in recent years, there has been a trend toward longer booms. Additional Information: Pump trucks use large-diameter, long-stroke delivery cylinders to increase the suction area and reduce the number of directional changes per unit time, thereby decreasing wear on components such as the delivery cylinder, concrete piston, wear plate, and cutting ring. This directly extends their service life. Maintenance methods for pump trucks should follow the requirements and procedures outlined in the maintenance manual. Daily use should include pre- and post-operation checks of relevant components. Refer to the lubrication table in the maintenance manual to ensure timely and adequate lubrication of all parts of the pump truck.