A spray gun forms a desired spray pattern by atomizing by means of atomizing air a spray liquid which is sprayed from a liquid ejection port openedclosed by a needle valve, and jetting pattern air to the flow of spray mist of the atomized spray liquid. The persistent wireless network browser toolbar is provided with a login status indicator, a logout option, and a wireless network signal strength indicator. According to an embodiment, an insulating film is formed on a substrate by a plasma process, which uses film-forming gas having a ring structure of Si\u2014O bonds, such that it maintains the ring structure of the Si\u2014O bonds. The fabrication of a nanopore electrode is accomplished by etching the nanodisk electrode to create a pore in the substrate, with the remaining ISTE comprising the pore base.