A steel for use in high strength pinion shaft which is not refined and used by applying high frequency hardening with less occurrence of peeling during hobbing, having high surface hardness, impact value and torsional strength after high frequency hardening, and with less heat treatment strains during high frequency hardening, containing, on the mass % basis; C; 0. This allows for a simple parallel data bit comparison capability that allows a fast initial comparison result without requiring a time-consuming individual bit-by-bit data comparison. The node contains alignment features that enable the positioning of an optical transmitterreceiver pair in the node using the data obtained from the GPS receivers and tiltmeter. A series of buttons are affixed to an outer face of the overlap but do not serve as fasteners.