- 燈具表面減光因數(shù)
- luminaire dirt depreciation factor ldd: 燈具塵埃減能系數(shù)
- surface mounted luminaire: 平面安裝燈具
- surface-mounted luminaire: 明裝照明設(shè)備
- depreciation factor: 減縮系數(shù); 折舊率減光補(bǔ)償率
- lamlumen depreciation factor lld: 燈管流明降落系數(shù); 流明降落系數(shù)
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