A method for making a container is disclosed. In the mobile communication system of the present invention, each wireless base station measures the strength of the radio waves received from a wireless terminal irrespective of whether or not the destination of the radio waves is the wireless base station itself. The laminated sheet is heated and pressed to provide a circuit-forming board. Further, each mega-cell is divided to cells, and different channels and time slots are allocated to each cell, from those allocated to the corresponding mega-cell. The synchronization segment includes 66 bits, which includes a first number of bits having nonzero values and a second number of bits having a value of zero. The valve assembly has a rigid collar which mounts in an opening in a wall of a container to receive an exit end of a fill nozzle of an inflating system which supplies pressurized gas for inflating the flexible bag.