It is called "can unloader", also called "unloader", "unloading pipe", etc. A tank unloader is a tool specially used to unload materials from pressure tankers. It is usually made of metal and has a certain length and curvature to facilitate the unloading of materials from the tanker. The shape and size of the tank unloader will vary according to different pressure tankers and material types, so it is necessary to select the appropriate tank unloader according to the specific situation.