[多选题]在使用带电清扫机械进行清扫前，应确认（）。
A.清扫机械工况（电机及控制部分、软轴及传动部分等）完好
B.绝缘部件无变形、脏污和损伤
C.毛刷转向正确
D.清扫机械已可靠接地
E./
F./
G./
H./

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