A height-adjustable implant for insertion between vertebrae, includes first and second sleeve parts which are rotationally fixed in coaxial alignment and interconnected in an axially displaceable manner. The method enables materials for making PCBs to be always maintained in an optimal working condition to ensure production of high-quality PCBs. The system also includes one or more second optical elements configured to image light exiting the diffuser onto an illumination pupil of the system such that the predetermined pattern is reproduced in the illumination pupil. The stump land value component may be normalized by a crop rotation time period. When a medium necessary for normal operation of the dishwasher is lacking, some or all the illumination elements of the operation display panel can be intermittently activated. A proximal anchor, adapted to abuttingly engage portions of a bladder neck so as to at least proximally anchor the device, is supported at least indirectly by the proximal segment of said elongate member.