- three pole switch
- three-pole switch
- triple pole switch
- 三: three
- 刀开关: knife switch; knifetch
- 三刀掷开关: three-pole double throw switch
- 串闸刀开关: tandem knife switch; tandem knife-switch; tandem-knife switch
- 单刀开关: one pole switch; single blade switch; single knife switch; single pole switch; single-pole switch; single-switch
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