单词	发光因数
释义	发光因数luminosity factor
随便看	british system of reference british system of unit british system of units british system umits british technology group british telecom british telecom 英国电信公司 british telecom，bt british thermal british thermal unit british thermal unit (btu) british thermal unit {= btu british thermal unit {= btu} british thermal unit {=btu} british thermal unit{=btu} british thermal unit{btu} british thermal unit {= btu-- btu } british thermal unit {= btu-- btu} british thermal unit {= btu; btu } british thermal unit {= btu; btu} british thermal units british thermal unit，btu，btu british thermal unit｛=btu｝ british togoland british ton