| http://www.w3.org/ns/prov#value | - FIG. 1B is a diagram showing how the surface roughness etc. of surface A on the right side of a work W is measured using the displacement detector in FIG. 1A. As shown schematically, the displacement detector is moved to the right side of the work W and arranged so that the contact 12 comes into contact with the surface A on the right side of the work W. In this state, the arm 11 is biased by the
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