A.采光材料的透光系數(shù) B.室內(nèi)構(gòu)件的擋光折減系數(shù) C.窗結(jié)構(gòu)的擋光折減系數(shù) D.窗玻璃的污染折減系數(shù)
A.5% B.2% C.1.5% D.0.5%
A.30 B.20 C.18 D.11