The invention relates to a method and means for managing packet queues in switches. The image pickup apparatus comprises a sound output section, and an operating member for operating the image pickup apparatus. At least one of the first side and the second side of the substrate includes a surface layer that does not substantially contain inorganic particles and forms an outermost surface layer of the substrate, which surface layer includes hemicellulose. The feeding wire is electrically connected to the mid-point of the meandering-line conductor for transmitting a received radio signal to the wireless communications system. An automatic transmission control unit operates the clutch mechanism and switches the speed change gear of the transmission automatically. The second magenta ink nozzle has a diameter smaller that of the first magenta ink nozzle, and the second cyan ink nozzle has a diameter smaller that of the first cyan ink nozzle.