A memory device includes a pair of complementary bitlines including a first bitline and a second bitline. The opening stroke of the needle which is axially displaceable in the longitudinal direction can be adjusted by way of a stroke limiter, and the needle tip comprises at least one notch for the pass-through of the injection-molding mass in its transitional region to the needle shaft. Mounted at the bottom of the display body, the lighting device has the light downwards to illuminate the whole keyboard area of the medical diagnostic device such that the structure is tight without occupying extra space, thereby no inconvenience occurs during doctors’ operation. The floating seal assembly according to embodiments of the invention is pressure driven in that each curved side of the end portions is configured to engage a low pressure side of the seal cavity in response to a pressure differential across the sealing cavity reaching a threshold value. The control device corrects an energization period of the next one of the injectors by lengthening the energization period of the next one of the injectors in comparison to a normal energization period of the next one of the injectors, which is set for a non-overlap injection operation of the next one of the plurality of injectors.