Abstract: The invention relates to a method for producing a cast metal part, in particular a housing of an electric motor stator, a housing for components of power electronics, and a battery tray or a battery housing, having the following steps: producing a cooling channel, introducing the cooling channel into a casting tool, filling the casting tool with a casting material, and molding the cast part. According to the invention, the production of the cooling channel includes a roll welding step.

Abstract: A suitcase (1) having an approximately cubic shape and two wheels (2) that are disposed near opposed bottom corners of the suitcase, also a handle (3) that is upwardly extendable and retractable from the suitcase (1) above the wheels (2) when the suitcase (1) is standing, furthermore a carrying handle affixed on an upper side of the suitcase and, optionally, an extendable floor support (20) located opposite the wheels on the floor side, with a seat surface disposed on the suitcase (1), which, when pulled, swiveled, swung or folded out when the suitcase is standing, completes the suitcase top (10).