A.管道安装 B.系统试压 C.系统冲洗 D.系统验收
A.屋顶一处，中间层一处 B.屋顶二处，中间层一处 C.屋顶二处，首层一处 D.屋顶一处，首层二处
A.塑料 B.铁皮 C.柔性 D.刚性
A.15% B.25% C.35% D.45%
A.100mm B.150mm C.200mm D.250mm
A.10h B.12h C.24h D.48h
A.300mm B.400mm C.500mm D.600mm
A.150mm B.200mm C.250mm D.300mm
A.30mm B.40mm C.50mm D.60mm
A.1mm B.2mm C.3mm D.4mm
A.100mm B.200mm C.300mm D.400mm
