After prestoring first character strings that occur frequently in words of languages and second character strings that are a typical therein, a device for automatically identifying the language of a text from a plurality of languages extracts words from the text and constructs all of the character strings contained in each extracted word. A lever member 41 is provided between the tubular member 21 and a valve plunger 14, and when the valve plunger 14 strokes through a given stroke or more relative to the valve body 3, the lever member 41 moves angularly to retract the tubular member 21 rearward relative to the valve body 3. The reflective element, light valve and projection lens are respectively disposed adjacent to the third, fifth and sixth surfaces. The apparatus further includes a source of electromagnetic radiation, a source of vacuum in fluid communication with the chamber, and a source for the coolant. Communication can be established directly between a pair of nodes in the network sharing a common band without the active intervention of any intervening node.