A.I△=50mAT△=0.2s B.I△=75mAT△=0.2s C.I△=100mAT△=0.2s D.I△=200mAT△=0.15s E.I△=500mAT△=0.1s
A.塑料B.竹C.木D.藤E.玻璃鋼
A.設(shè)置雙橫桿 B.加密欄桿柱距 C.加大橫桿截面 D.加設(shè)密目式安全網(wǎng) E.增設(shè)擋腳板