Abstract: Device for producing an elongated concrete element extending in the vertical direction, for example a tower of a wind turbine generator system, comprising an inner casing and an outer casing, the inner casing and the outer casing being configured in such a way that between the inner casing and the outer casing there is an interspace, which is of a height that is less than the height of the concrete element to be produced. A number of pumps are used, in order to pump concrete into the interspace. The pumps are designed in such a way that the concrete can be introduced at high pressure in such a way that the interspace is filled with concrete and that the concrete element is forced vertically upwards out of the interspace during the hardening of the concrete. As the concrete element rises, an attachments, that later serves for pulling up and mounting various elements, is transported upwards.

Abstract: A mass flow meter in which the mass flows along a path having a bend in one sense on one side of a pivot axis and a bend in an opposite sense on the other side of the pivot axis. When the material flows through the device a force is applied to part of the apparatus tending to rotate it. A force measuring device measures the force without the operative parts of the force measuring device moving by a significant extent.