电磁闸 [机] electromagnetic brake ; electro-magnet brake

磁闸罗盘 flux gate compass

液压电磁闸区制动器 hydraulic electromagnet brake-shoe

磁闸式地磁仪 flux-gate magnetometer

电磁离合器和电磁闸 Electromagnetic clutches and electromagnetic brakes

磁通量闸门罗盘 flux gate compass

电动机闸磁铁 motor brake magnet

磁通量闸门 [电磁] fluxgate

合闸电磁铁 closing electromagnet ; [电] making electromagnet