| http://www.w3.org/ns/prov#value | - For example, here, the judgment section 16 judges whether or not the level value concerned is above the threshold value and, if it is above the threshold value, it judges that a reflection signal has been obtained because the body has existed, and outputs a predetermined signal (It is a signal to the effect that there has been detected the fact that the body exists and, hereafter, referred to as a
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