An electronic apparatus is provided at one side with an adapting plate, on at least one side surface of which there is provided connecting lines, and a memory-card plug adapter is detachably connected to the apparatus through engagement of a socket provided at a front end of the adapter with the adapting plate on the apparatus. The shoe is rotatable and includes a device for inclining the to take at least two positions, the first in which the working surface is parallel to the support for the layers to take up a predetermined volume of powder and a second in which this working surface is inclined at an angle \u03b1 relative to the support. The polymer is excreted in the feces wherein the polymer and absorbed fluid is removed from the body. Orders within the price threshold are matched at the price threshold against orders beyond the price threshold, in order to dampen any instantaneous damaging effects of the price spike. The electric motor is connected to a brake circuit which applies an electrical load to the motor if the rotational speed exceeds a predefined value.