A.風(fēng)管系統(tǒng)嚴(yán)密性試驗(yàn) B.空調(diào)設(shè)備安裝 C.空調(diào)水系統(tǒng)安裝 D.管道防腐與絕熱
A.10m/s B.12m/s C.15m/s D.20m/s
A.0.5% B.0.8% C.1% D.1.5%