An LED lamp fixture is provided with a frame; a plurality of bulb sockets mounted on the frame; and a plurality of LED lights each mounted between the bulb socket and a predetermined position of the frame opposite to the bulb socket. 3\u2003\u2003; andsecond step: a step of removing the template from the solid prepared in the first step. In a first concrete-placing step, an initial section of a concrete wall is formed. In another embodiment, the control engine compares the size of the receive aperture with a predetermined number of reconstruction channels at each imaging point and preprocess the selected echo signals to produce reconstructions signals that are equal in number to the number of reconstruction channels if the size of the receive aperture is greater than the number of reconstruction channels. The latching mechanism is preferably configured such that, already before reaching the coupling end position, the latching mechanism is activated so far that it counteracts a relative rotation of the coupling halves in an opening direction.