00978na  a2200241   4500001001500000005001500015008004100030040001900071041001300090049003000103052002200133056001400155082001900169100004800188245016700236260003600403300003000439502008000469653012300549950002100672963002000693965002300713KDM199000949  19941011180907900619s1989    ulka       AB 000   kor    a011001c0110010 akorbeng0 lEM746598lEM770560c2fDP01a569.99b김774ㄱ  a569.99230 a621.3804122191 a김장권,g金長權,d1949-0KAC20181779510a高效率 廣帶域 超音波 變換器의 實現에 關한 硏究=x(A)study on the implementation of broadband, high efficient ultrasonic transducer/d金長權  a서울:b慶熙大學校,c1989  avii,96장:b삽도;c26cm1 a학위논문(박사) --b慶熙大學校 大學院:c電子工學科,d1989  a고효율a광대역a초음파a변환기a실현aIMPLEMENTATIONaBROADBANDaHIGHaEFFICIENTaULTRASONICaTRANSDUCER1 a비매품b\4100  a전자공학과  a초음파변환기