A.2.0m B.1.8m C.1.5m D.2.5m
A.80B.150C.160D.170
A.2m B.1m C.2.5m D.0.8m
A.2mB.3mC.4mD.5m
A.4~5個(gè)立桿間距或5~7m B.6~8個(gè)立桿間距或7~9m C.8~10個(gè)就杵間距或8~10m D.2~4個(gè)立桿間距或2~4m
A.1/200 B.1/250 C.1/300 D.1/400
A.沿地面 B.埋地 C.架空 D.沿鋼支架 E.沿腳手架