A freight car with a door in the floor through which materials are unloaded.
底卸式车一种货车，底下装有可卸货的门。
2
To get to the Skylark, Ms. Calegari entered a barely noticeable door on a side street, rode up 30 stories in a freight elevator and climbed two flights of narrow stairs, as if entering a speakeasy.
As an advanced model of transportation organization, the system of highway express freight transportation has realized rapid, safety, right and "door-to-door" service.