Classification of solar energy resources—Direct radiation
全国气候与气候变化标准化技术委员会风能太阳能气候资源分技术委员会(SAC/TC 540/SC 2)
本标准规定了太阳能资源（直接辐射）的等级。 本标准适用于太阳能直接辐射资源的评价和区划。
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