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ASHRAE 74-1988
M00003932
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ASHRAE 74-1988 Standard 74-1988 -- Method of Measuring Solar-Optical Properties of Materials
standard by ASHRAE, 1988
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To develop a standard method for measuring and reporting the following solar optical properties of materials: spectral transmittance, reflectance, and absorptance between 320 nm and 3000 nm in wavelength, and total radiant and luminous transmittance and reflectance.