1)coercive force,保磁力2)hold-in winding magnetic force,保持线圈磁力3)permanent magnet holding force,永磁体保持力4)safe type magnetic force drive valve,保安型磁力传动阀5)keeping-eletromagnet,保磁6)magnetism,磁力，磁性
用法例句
The structure feature,working principk and characteristic of the safe type magnetic force drive valve were introduced.