共 6 条
[1]
CRECRAFT DI, 1969, NONDESTRUCTIVE TESTI
[2]
FOSTER NF, 1968, IEEE T SONICS ULTRAS, VSU15, P28
[3]
GIBSON RW, 1966, ELECTRONICS LETTERS, V4, P213
[4]
KLERK JD, 1965, REV SCI INSTRUM, V36, P506
[5]
PAGE DJ, 1966, P IERE IEE JOINT C A, P9