magnetic hum磁哼声magneticadj.有磁性的；有吸引力的；催眠术的n.磁体，磁性物质magnetic pole strength磁极强度magnetic core material磁芯材料Magnetic force tracker磁力跟踪器magnetic residual loss剩磁损失magnetic water treater磁水器magnetic multi-polar磁多极子magnetic centre of gap磁隙中心magnetic disk recorder磁盘记录器magnetic tape ransport磁带传送机构magnetic-core matrix磁心矩阵