| http://www.w3.org/ns/prov#value | - An instrument according to claim 14 further comprising a home position sensing switch located within said ruler body and so disposed as to be actuated whenever said slider is moved to said first end position, said switch being adapted to thereupon generate said Awaken command to said microcomputer so as to (1) to reactivate all system functions including said display device and said light source
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