A method and apparatus for establishing a network connection using a temporary Internet Protocol address are disclosed. In the illustrated embodiment, the ionization unit consists of three coaxial cylindrical bodies having a three aligned longitudinal slits for directing electron beams from externally located electron gun onto the axially arranged flow of droplets. When an air bag starting to inflate presses any one of the panel members of the movable reinforcing panels upward after an air bag system is operated, regions corresponding to the movable reinforcing panels of the door panels are deformed outward. In addition, the platform increases the electrical inputoutput density of the header by increasing the number of potential electrical connections between the two sides of the base. The vibrating membrane covers the through hole, and the vibrating membrane includes at least one carbon nanotube structure with two opposite ends. The main valve includes a spring supporting portion that contacts an end surface of the leaf valve and supports a valve disc side end portion of the plate spring, and a tubular collar that extends in the axial direction, and is provided to be free to move in the axial direction relative to the shaft member.