共 9 条
[3]
ISLER WE, 1977, B AM PHYS SOC, V22, P354
[4]
JOHNSON CE, 1970, Patent No. 3510878
[6]
MASKOWITZ R, 1975, IEEE SPECTRUM, V12, P54
[7]
NEWBOWER RS, 1973, IEEE T MAGN, VMAG9, P447, DOI 10.1109/TMAG.1973.1067671
[9]
Stephen PS, 1965, US Patent, Patent No. [3,215,572, 3215572]