A pin and socket for high current applications enables a printed circuit board to be directly connected to an electrical device. An initial set of RACH preamble sequences in one cell of a radio base station and statistics on RACH usage and information on identified RACH preamble sequences potentially conflicting between neighbours of said radio base station is collected. Then, the silicon substrate is etched to form a through silicon via, and the through silicon via extends down from a surface of the silicon substrate. The electric power steering device further includes a diameter enlargement member which is arranged in the first tubular portion and which enlarges a part of the first tubular portion in an axial direction thereof to press the internal teeth portion toward the external teeth portion. Prongs of the device are movable between a retracted position and an extended position along two different travel paths by actuating the prongs or by actuating the carriage. An electrolyte layer includes a redox couple formed of compounds represented by General Formula and Formula, and ionic liquid having bisimide anion represented by Formula.