| http://www.w3.org/ns/prov#value | - If exactly the same inclination is desired both for the longitudinal gradient X and for the transverse gradient Y, the auxiliary axis H will lie exactly in the centre between the two gradients X and Y, i.e. at an angle of exactly 45??? to each of the two measurement axes X and Y. The more the inclinations of the longitudinal gradient X and the transverse gradient Y differ from one another, the clo
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