A Bulk Cement Semi-Trailer (also known as a Bulk Cement Tank Semi-Trailer, Pneumatic Dry Bulk Semi-Trailer, or Cement Tanker Semi-Trailer) is a specialized semi-trailer designed for the transportation and pneumatic unloading of dry bulk powder materials such as cement, fly ash, lime powder, gypsum powder, and mineral powder. The trailer features a sealed pressure tank, air compressor system, fluidization equipment, and discharge pipelines that enable efficient, dust-free, and