Trailer (semitrailer, pole trailers) are towed, unpowered vehicles to transport goods. Trailers are classified into passenger trailer, bus trailer, cargo drop-side trailer, dump trailer, tank trailer, van trailer, special trailers. By the body type, trailers/semitrailers are divided into three categories: tanks, open body, closed body. By the body design: refrigerators, tilt-covered, all-metal, isothermal trailers, container carriers, vehicle carriers, timber carriers, livestock carriers, glass carriers, platforms. At the Port of Machinery trading site, trailers/semitrailers by the leading global producers, such as Schmitz, Ackermann, Fortschritt, Müller Mitteltal, Emtech etc. are offered for sale.