magnetic ore磁性矿石magneticadj.有磁性的；有吸引力的；催眠术的n.磁体，磁性物质magnetic fault find method磁性探伤法magnetic field tuned laser磁场调谐激光器Magnetic compass deviation磁罗经自差magnetic field measurement磁场测量magnetic type speed ometer磁力式速度计magnetic core storage unit磁心存储部件magnetic quantum structure磁量子结构magnetic rectifier control磁整流控制magnetic logging principle磁测井法magnetic separation theory磁选理论