00722nam a2200229 c 4500001001500000005001500015008004100030020002200071040001900093049004200112052002100154056001300175082001200188245006400200260003600264300002600300504002900326653002700355700005200382700004800434950001000482KMO199927256  20180731092638991004s1999    ulka          000   kor    a8988017102g03400  a011001c0110010 lEM1937418lEM1937419c2lEM1995900c301a507.5b박496ㅂ  a507.5240 a60822100a발명 특허의 과학/d박영택;e박수동 [공]지음  a서울:b현실과미래,c1999  a240p.:b삽도;c23cm  a참고문헌 : p.238-240  a발명a특허a과학1 a박영택g朴永宅,d1956-0KAC2014068634aut1 a박수동,g朴壽東,d1974-0KAC2018031420 b\8000