A suspension device for supporting an air brake hose on a rail car is disclosed. Both of the bar code reader 2 and RF-ID reader 3 are set to the positions that information can be read from the bar code and RF-ID tag. The present invention also provides expression constructs and methods of administering such expression constructs. In another aspect, the MUX is placed in the feedback loop of the PLL. Thus, a controllable extraneous imbalance is created between the output loads of the balanced circuit arrangement to thereby obtain a linearization by means of even-order non-linearity. Aperture walls of adjacent apertures intersect the second major surface without intersecting each other.