... the purpose of creation. Remote-control robots are often used to explore places where humans cannot reach.4 When an earthquake occurs, it is faster to send in a recently developed robot Souryu which is rubber snake like robot to search for survivors than scrambling for the victims of the disaster by humans.5 When usual geological movements are detected, Date 2, which is a huge robotic spider, will be launched to go to the disastrous places that humans cannot go. Scientists can notify the problem through the view of the robot instead of sending in an expedition team. For military purposes, robot planes such as global hawk which provide the newest images of the battlefield and sky exploration to reveal the unknown area.6 Other robots such as underwater robots are able to allow us to observe accurately in difficult situations for long period of time, retrieve artifacts, reveal the unknown and explore ...

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