It is a special operation vehicle.

Cement tank trucks are also called bulk cement trucks, powder tank trucks, tank trucks, and powder material transport trucks. They are composed of a special car chassis, a bulk cement truck tank, a gas pipeline system, and an automatic unloading device. It is suitable for bulk transportation of dry materials with particle diameters not larger than 0.1mm, such as fly ash, cement, lime powder, ore powder, and granular alkali.