A . 36
B . 24
C . 12
D . 6
[单选题]在隧道内施工,照明电源电压不应大于()。A.36VB.24VC.12VD.6V
[单选题]在隧道内施工,照明电源电压不应大于()。A .36VB .24VC .12VD .6V
[单选题]在遂道内施工,照明电源电压不应大于()A.36VB.24VC.12VD.6V
[单选题]在遂道内施工,照明电源电压不应大于()。A.36VB.24VC.12VD.6V
[单选题]在遂道内施工,照明电源电压不应大于()。A.36VB.24VC.12VD.6V
[单选题]在金属容器内施工,照明电源电压不应大于()。A.36VB.24VC.12VD.6V
[单选题]在金属容器内施工,照明电源电压不应大于()。A.36VB.24VC.12VD.6V
[单选题]在金属容器内施工,照明电源电压不应大于()。A.36VB.24VC.12VD.6V
[单选题]隧道.人防工程.高温.有导电灰尘.比较潮湿或灯具离地面高度低于2.5m等场所的照明,电源电压不应大于( )V。A.12B.24C.36D.48
[单选题]隧道.人防工程.高温.有导电灰尘.比较潮湿或灯具离地面高度低于2.5m等场所的照明,电源电压不应大于()V。A.12B.24C.36D.48