single-pole knife switch [电] 单极闸刀开关

one-pole knife switch 单极闸刀开关

one pole knife switch 单极闸刀开关

three-pole knife switch 三极闸刀开关

two pole knife switch 双极闸刀开关

two-pole knife switch 双极闸刀开关

three-pole double-throw knife switch 三极双掷闸刀开关

two-pole e knife switch 双极闸刀开关