A photolithography system includes a variable-volume buffer tank, a dispensing system connected to the buffer tank, and a valve configured to release gas from a head space of the buffer tank while blocking the release of liquid from the head space. The condensed refrigerant from the inlet part R2 flows in the liquid tank 4 through an inlet port 1a of an inlet-port side connecting pipe 4a connected with the inlet part R2 of one header 2 of the pair of header. A remote control selectively displays URLs andor their associated web pages stored in memory by the Internet portal. Further, the tubular member can be modified at its ends to facilitate insertion of a sling and stacking of adjacent mats.