A.500mm
B.450mm
C.300mm
A.500mm
B.650mm
C.800mm
A.500mm
B.650mm
C.800mm
A.利用水平尺、卷尺测量B/F柱处接触线间水平距离500mm,垂直距离300mm
B.承力索水平距离为500mm、垂直距离为750mm
C.承力索水平距离为500mm、垂直距离为650mm
D.测量两支不同悬挂、定位间任何部件的空气绝缘距离不得小于500mm
A.500mm
B.450mm
C.300mm
A.500mm
B.700mm
C.800mm