A device for the delivery of coins from a coin dispensing station to a mobile supply device or from the mobile supply device to a coin receiving module. Preferably, phase tracking is implemented by systematically identifying and rejecting at least one worst sampling position, and sampling the data signal at a non-rejected sampling position. The method further includes applying a magnetic field of sufficient intensity to align the graphite nanofibers in the thermal interface material. An air supply device supplies clean air to the wafer transfer area and the wafer process area. The first duct body part is attached to the top plate. If responses received from each server are substantially the same, a message is sent to the client.