A laser patterning touch panel includes an active area, an inactive area, and a plurality of first coaxial patterns. The composition is preferably used for forming light-blocking separators or black matrices of organic electroluminescent devices and liquid crystal display elements. In other more specific example embodiments, the communicating the control protocol message includes pushing the control protocol message to one or more other tunnel endpoints. The enlarged portion forms an easy pour spout. Accordingly, it is possible to provide an engine generator which allows the control system to be replaced with another type control system by easy replacing work.