A gain deviation is leveled in the same band by using a varactor diode having the same characteristics as that used in an input tuning circuit for coupling the input tuning circuit and a high frequency amplifier without using a costly and special varactor diode. The notifications may provide an indication of events that have occurred in the virtual game spaces, offers of virtual goods, andor other information related to the virtual game spaces. A gas cushion feed assembly supplies a gas under pressure between the print head and substrate which opposes the biasing of the print head toward the substrate so as to form a space between the print head and substrate. Lead wires 6a, 6b are connected to the outer end and the inner end of the conductor 1, respectively. When the pressure within the fluid container needs to be decreased, irrigation fluid is allowed to be bled out of the fluid container and inter the collection chamber.