000  $anz n  2
000  $a주제어
001  $aKSH1998032063
005  $a20021116000000
008  $a980429 n azknnaabn          |a a|a    | 
150  $a바이폴러 전송[--電送]
450  $wr$i영어$abipolar transmission
550  $wg$a전송(전달)[電送]
550  $wg$a텔레커뮤니케이션[telecommunication]
550  $a양극성[兩極性]