Disclosed is display part such as a TFT array panel comprising an aluminum layer, and a molybdenum layer formed on the aluminum layer. Embodiments of the invention process multi-leg transactions while allowing later arrived orders to get processed during the time when an earlier, tradable multi-leg transaction is pending using a look-ahead mechanism without violating any relevant timing or exchange rules. Thus, a real subband combining filter and a real band expander which require a smaller amount of calculations can be used instead of a complex subband combining filter and a complex band expander, while maintaining a high sound-quality level, and the required amount of calculations and the apparatus scale can be reduced. The wear-resistant coating system contains alternating layers of TiAlN and CrN. A command signal applied to the switch may correspond to a modulating signal for transmission on a channel, such as a high noise channel.