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installationseinrichtung for buildings with prefabricated bautafeln from erhaertender mass, especially of concrete, in the doses and electric wires wired and ready electrical necessary as switches, sockets, etc. in the bautafeln casted are connected
installationseinrichtung for buildings with prefabricated bautafeln from erhaertender mass, especially of concrete, in the doses and electric wires wired and ready electrical necessary as switches, sockets, etc. in the bautafeln casted are connected
