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GB/T 2680һ94
´úÌæGs 2680-81
Determination of light transmittance,solar
direct transmittance,total solar energy transmittance
and ultraviolet transmittance for
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GB_T 2680-1994 建筑玻璃 可见光透射比、太阳光直接透射比、太阳能总透射比、紫外线透射比及有关窗玻璃参数的测定.pdf