magnetic key磁动电键magneticadj.有磁性的；有吸引力的；催眠术的n.磁体，磁性物质magnetic field change磁场变化magnetic virgin state未磁化状态,无残磁状态magnetic-force pump磁力泵magnetic stray factor磁杂散系数magnetic clutch motor磁力离合器电动机magnetic quantization磁量子化magnetic modification磁性改性magnetic tape channel磁带通道magnetic core antenna磁芯天线magnetic powder brake磁粉制动器