A fiber distribution system includes one or more fiber distribution hubs that provide interface at a splice panel andor a termination panel between incoming fibers routed from a central office and outgoing fibers routed to network subscribers. The spray nozzle includes a wall-surface dedicated nozzle provided along a wall surface in the CO2 absorber and a liquid dispersion nozzle provided inside of the wall-surface dedicated nozzle in the CO2 absorber. The switching system further includes a switch device communicatively coupled to each of the plurality of input line cards and the plurality of output line cards. The memory device includes electrode pads arranged along a long-edge positioning in a vicinity of the first long-edge of the wiring board, and one-sidedly disposed so as to correspond to disposed positions of the connection pads. Mass gas flow controllers are arranged to control flow into respective inlet ports.