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발명특허교실 : 발명특허 Q & A(22회)
발명특허교실 : 발명특허 Q & A(22회)
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MARC
008171130s1991 aa kor■022 ▼a12271144
■245 ▼a발명특허교실 : 발명특허 Q & A(22회)▼d김석환
■300 ▼app. 86
■7001 ▼a김석환
■773 ▼t자동화기술 : AUTOMATION SYSTEMS▼gv.7 n.4▼d1991, 04
■SIS ▼aKS003450▼b63102▼h3▼sG
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