three pole double throw knife switch

... three-piece suit 成套服装 three-pole double-throw knife switch 三极双掷闸刀开关 three-position switch 三位置转换开关 ...

... three-pole 三极的 three-pole double-throw knife switch 三刀双掷闸刀开关 three-pole gang operated switch 三极联动开关 ...