The Curtain Semi Trailer can load and unload cargo on both sides at the same time, and the loading and unloading efficiency is much higher than that of side-rail or gate-type trailers. The sliding roof can be opened for loading, and heavy goods such as steel coils can be hoisted into the side curtain car by a crane and then fixed.
Curtain-side trucks have almost no choice in the type of goods they transport. LTL, department stores, fruits, vegetables, and trees can basically be transported as long as they can be loaded.