Abstract: The invention relates to a flap unit (1) for fitting into a flap opening, which allows access to a luggage or service compartment, in the wall of a camping vehicle. Said unit comprises a flap frame (3) and a flap (2) that is pivotally mounted on said frame and the flap frame preferably consists of a first frame part (5), which borders the flap opening on the vehicle interior and a second frame part (6), which borders the flap opening on the vehicle exterior, in such a way that the first and second frame part (5, 6) interlock when mounted. One frame part (6) has a connection (11) for coupling a ventilation or water supply or drainage line on the vehicle interior and said connection (11) can be linked to the external surroundings of the vehicle in such a way that the line coupled to the connection comes into contact with said surroundings through at least said frame part (6).

Abstract: The furnace effects a partial heat-treatment of drills and similar tools having a clamping portion and a working portion and with respect to which it is important to subjecting only the working portion, to a heat treatment, particularly hardening. The physical properties of the clamping portion are, retained essentially in their original state during the heat treatment. The furnace is provided with a tool receiver that cooperates with hearth-bottom plates that are traversed by cooling fluid. The tool receiver assures that the drills or other similar tools are maintained in their clamping portion at substantially the same temperature level during the heat treatment while the working portion of the tools is freely exposed to the heating and quenching.