Ⅱ类设备是带有双重绝缘结构和加强绝缘结构的设备。下列图片所示的电气设备中，Ⅱ类装备是( )。
A 冲击电钻<img width="159" height="87" src="https://www.beizhujiaoyu.com/uploads/202208/20201125202022_1645.png" /> B 机床<img width="212" height="117" src="https://www.beizhujiaoyu.com/uploads/202208/20201125202022_8364.png" /> C 低压开关柜<img width="146" height="98" src="https://www.beizhujiaoyu.com/uploads/202208/20201125202024_3520.png" /> D 电焊机<img width="120" height="111" src="https://www.beizhujiaoyu.com/uploads/202208/20201125202024_9770.png" />
