The present invention relates to a digital audio watermark insertingdetecting method and apparatus. The depositwithdrawal port includes at least a delivering mechanism for delivering bills deposited by users, and a push plate operation mechanism for moving a push plate which forms an accepting unit and which supports bills. A related method is also disclosed. Here, the insulating member overlapping the rerouting is provided with a plurality of spaces in which air is trapped. The ESD detection circuit includes a capacitor, a resistor, and a triggering component. A method of using the shotgun cleaning shell, comprising: loading a shell in a shotgun, firing the shotgun, and drawing the contents of the shell through the bore of the shotgun.