Measuring points. 1.2.1. The principal radii of curvature shall be measured at three points situated as close as possible to positions at one-third, one-half and two-thirds of the distance along the arc of the reflecting surface passing through the centre of this surface and parallel to segment b, or of the arc passing through the centre of the reflecting surface which is perpendicular to it if this arc is the longer.
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Samples: www.consautoregs.com, www.unece.org, unece.org
Measuring points. 1.2.1. The principal radii of curvature shall be measured at three 3 points situated as close as possible to positions at one-third1/3, one-half 1/2 and two-thirds 2/3 of the distance along the arc of the reflecting surface contained in a plane parallel to the greatest dimension of the mirror and passing through the its centre of this surface and parallel to segment b, or of the arc passing through the centre of the reflecting surface which is perpendicular to it if this arc is the longerit.
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Samples: www.unece.org, unece.org
Measuring points. 1.2.1. The principal radii of curvature shall be measured at three three/points situated as close as possible to positions at one-third, one-half and two-thirds of the distance along the arc of the reflecting surface passing through the centre of this surface and parallel to segment b, or of the arc passing through the centre of the reflecting surface which is perpendicular to it if this arc is the longer.at
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Samples: unece.org
