A system is provided in which locally-generated graphics may be displayed on a user’s equipment. A pumping voltage controller is configured to output a pumping voltage control signal by receiving a power voltage control signal having a different output level according to a power voltage region where a power voltage belongs when the power control signal is applied. From among the plurality of synchronization signals received by a given station having a time phase earlier than that of its internal clock, only the earliest of the received synchronization signals is considered. The suction force is produced by a low pressure in a hollow compartment below the support plate and acts on the glassglass ceramic article by means of a gap formed between each shaping die and the support plate. A driving tool may be provided for turning the screw.