00669nam a2200217 k 4500001001300000005001500013008004100028020003100069049002800100052001700128056001500145082001700160245005000177260003000227300002900257504001700286650005300303653003100356700005300387950001100440KMO20041315120180827173614040519s2004 ulka 001 kor  a8975281159g93560:c\100000 lEM3037514lEM3037515c201a567.656b4-1 a567.656240 a621.385722120a(알기쉬운)전자교환기/d김동일 저 a서울:b斗陽社,c2004 ax, 182p.:b삽도;c24cm a색인수록 8a전자 교환기[電子交換機]0KSH2002025445 a전자교환기a교환기1 a김동일,g金東逸,d1958-0KAC2018267724aut0 b\10000