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AASHTO T 257
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AASHTO T 257 96th Edition, January 1, 1996 Standard Method of Test for Instrumental Photometric Measurements of Retroreflective Materials and Retroreflective Devices
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Description / Abstract:
This standard covers procedures for instrumental determinations
of photometric characteristics of retroreflective materials and
retroreflective devices.
The values stated in SI units are to be regarded as the standard.
The values stated in SI units are to be regarded as the standard.