A.6m B.4m C.8m D.10m
A.45° B.55° C.60° D.40°
A.50mm B.60mm C.30mm D.70mm
A.甲方现场代表B.工程负责人C.监理工程师D.安装负责人
A.1.8m；200mm B.1.5m；300mm C.1.5m；400mm D.1.8m；500mm
