In one embodiment, a method includes obtaining a call from a caller, and determining whether to offer a first callback time to the caller. The 1,4-disubstituted piperazines act as 5HT1A receptor binding agents useful in the treatment of Central Nervous System disorders. The supply pipe of the piping unit has a horizontal pipe portion horizontally extending along an array direction of the liquid processing units, such that the process liquid is supplied from the horizontal pipe portion to the liquid processing units individually. The rollers are then employed at the start of production or after a ribbon of glass has snapped off in order to transmit an advancement force to the ribbon of glass.