At the bottom of the stairs my hand met an electric switch. I turned it, and a great electrolier of twelve red globes flooded the cellar with a red light.
2
记住，开关可能突然弹起或出现故障，所以不要因为看到刀锯停止转动了，就肆无忌惮的将手靠过去。
Remember that switches can be inadvertently bumped or malfunction, so just because the blade has stopped, don't relax and put your hands too close.
3
介绍了杆式手操作真空负荷开关的研究。
A study of the rod type manual operated vacuum switch (RMVS) is introduced.
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