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Chinese Standard: GB/T 2680-1994

Determination of light transmittance, solar direct transmittance, total solar energy transmittance and ultraviolet transmittance for glass in building and related glazing factors

NEQ  ISO 9050:1990

This standard is the original Chinese electronic standard.
If you need translation, please contact email: ChineseStandardsLibraryS001@gmail.com.
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