We herein declare that the products that we manufactured are “DRC metal conflict-free”, the metal of gold(Au),tantalum(Ta),tungsten(W) and Tin(Sn) are not derived from or sourced from mines in conflict areas of the Democratic Republic of Congo(DRC), or illegally taxed on trade routes, either of whic

Selects the high accuracy low power loss the ultrasonic wave to take the range finder sensor, the constitution ultrasonic sensor network makes the goal the localization and the track. The traditional localization of target follow-up research considers the goal only generally the position, but has ne