Mechanical deterioration method. The outer face of the three new samples (lenses) shall be subjected to the uniform mechanical deterioration test by the method described in Appendix 3 to this annex.
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Mechanical deterioration method. The outer face of the three new samples (lenses) shall be subjected to the uniform mechanical deterioration test by the method described in Appendix appendix 3 to this annex.
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Samples: www.unece.org