共 7 条
[3]
LUUKKALA, 1972, J APPL PHYS, V43, P2510
[4]
MAERFELD C, 1973, P ULTRASONICS S MONT, P155
[5]
MOTZ MD, 1973, P ULTRASONICS S MONT, P152
[6]
SMITH JM, 1973, P IEEE ULTRASONICS S, P142