开关器 meaning in Chinese

derailing switch

Molded - case circuit breakers , molded - case switches , and circuit - breaker enclosures
模制断路器,模制开关器和断路器外壳
Low voltage switchgear and controlgear - switches disconnectors and fuses combination units
低压熔断器；低压开关器及控制器-开关切断器及熔断器组合单位；
A mini - exhibition to display a wide range of computer assistive device for people with disabilities , including english cantonese screen readers , braille display , screen magnifier , scanning keyboard , suck and blow switch and etc
会场设立小型展览会以展示一系列辅助残障人士的电脑工具，包括英语广东话屏幕朗讲软件点字显示器屏幕放大软件扫描键盘呼吸开关器等等