A vehicular seat assembly having a backrest capable of reclining between maximum upright and maximum rearward conditions. A stepping motor rotates the reflection unit to move the virtual image continuously in a predetermined section of the combiner. The PLC symbol structure according to one embodiment systematically contains information required for automatically generating the inputoutput model, making it possible to automatically generate the inputoutput model for testing the PLC code in an easier manner without knowledge of simulation and modeling, and reducing the time consumed and the labor required for generating the inputoutput model. Signal transmission linedetonator contacts are susceptible to disruption, particularly when the signal transmission lines are subject to inadvertent tugging or tensile forces at the blast site. Such compounds are represented by Formula as follows:wherein R1, W andare defined herein. Additionally, an interposer devise is mounted between the chip and the substrate, wherein the interposer device interconnects the substrate pads configured in a first pattern with the electrodes configured in an arbitrary second pattern on the chip area, wherein the electrodes have a reduced electrode pitch essentially smaller than said pad pitch.