| http://www.w3.org/ns/prov#value | - portions, i.e. wherein the surface portions form an angle ?? to each other over a section of the assembling area, wherein 0<??<90 degrees, or preferably 0<??<3 degrees, such as ??=2.3 degrees, or so that the angle provides a gap between the sensor unit and the body which gap is in the size of up to 0.1 mm.
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