A.3m B.5m C.7m D.10m
A.50n1 B.5m C.500m D.150m
A.裸導(dǎo)線架設(shè) B.裸導(dǎo)線敷設(shè) C.絕緣線架設(shè) D.絕緣線架設(shè)或電纜線敷設(shè)