A vehicular door sash includes a sash frame formed by subjecting a predetermined metal sheet to a roll molding process to have a predetermined cross section. A protective member H is mounted so as to be displaceable to a removal disabling position in which the protective member H obstructs the removal of the cooling fan F by abutting against the cooling fan F, and to a removal enabling position that permits removal of the cooling fan F. Each of the latches includes a catch disposed on the base, and also engageable through the orifices of the wheel rim, and having one or more cut off portions to form one or more tongues in the base. Shadow images of registration markers are used to aid in computing the azimuth; computing the elevation angle; and using the elevation angle and azimuth to compute the coordinate of source position with respect to the sensor. A plurality of bosses are also disposed on the fingers, each of the bosses having a generally flat surface.