1.Three flatbed or skeleton semi-trailers are loaded into a 40 feet container. 2.The suspension and rear part are not welded but assembled by bolts. The trailer can be totally assembled after unloading 3.In order to facilitate loading, the euphroe is not welded and can be operated and welded easily by yourself. 4.The status of rest parts is as same as that of two trailers putted in one container.