alternating-current electromagnetic pump 交流电磁泵 ; 交流电磁帮浦

alternating-current electromagnetic 交流电磁

direct current electromagnetic pump 直流电磁泵

pump direct-current electromagnetic 直流电磁泵

alternating-current electromagnetic relay [电] 交流电磁继电器

alternating current electromagnetic relay 交流电磁继电器

electromagnetic current meter 电磁流速仪

direct-current electromagnetic 直流电磁

eddy current electromagnetic field 涡流电磁场

direct-current electromagnetic pump 直流电磁泵