应急电源电路断路器
emergency source circuit breaker
备用电源断路器
auxiliaries-supply circuit-breaker
铲运机发动机电路断路器
scraper engine circuit breaker
电路断路器分流跳闸线圈
circuit breaker shunt trip coil
电路断路器辅助触点
circuit breaker auxiliary contact
电路断路器跳闸额定值
circuit breaker trip rating
电路断路器原理图
circuit breaker schematic