Abstract: The invention relates to a multiple insertion head for mounting components (300) onto substrates, said insertion head comprising a carrier (200) which is arranged in such a way that it can rotate about a rotational axis (D) and is provided with a plurality of receiving tools (210) that are arranged in such a way that they can be displaced in a mounting direction at an angle to the rotational axis (D), said receiving tools being used to receive the components (300). Each receiving tool (210) is provided with at least one active drive and/or sensor, ensuring that the components (300) are rapidly positioned with the highest precision.

Abstract: A process for operating a fuel cell installation and a fuel cell installation for carrying out the process include at least one fuel cell block. A process gas for the fuel cell block is fed into the fuel cell block with a liquid ring compressor. In this way, the process gas is humidified at the same time as it is compressed, thus using the compression heat simultaneously as evaporation enthalpy, as well as the heat from the cooling circuit of the fuel cell stack.