A vehicular torsion bar suspension device, which comprises a front torsion bar spring and a rear torsion bar spring respectively installed at front and rear suspensions of the vehicle. Tissue images processed by various embodiments described herein may be generated by Hematoxylin and Eosin staining, immunofluorescence detection, immunohistochemistry, similar andor related staining processes, andor other processes. When excitation current in the free-wheeling path is not to be absorbed by the RC circuit, the by-pass switch is ON, thereby providing a low-impedance path for the excitation current. The image blocks are then encoded into encoded block representations. While the image carrier is being mounted on an apparatus body, the exposure unit is moved away from the image carrier in an optical axis direction of the exposure unit as a result of the first contact portions coming into contact with the image carrier, and the exposure unit and the image carrier are positioned as a result of the first contact portions coming into contact with the image carrier.