| http://www.w3.org/ns/prov#value | - cated opposite each other, particularly diametrically opposite each other, along the circumference. [0169] The wall openings 113, 114 and the end faces 231, 241 may also be spaced along a chord of the circumference of the measuring tube 1 and/or be disposed in the measuring tube 1 nonsymmetrically, see
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