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发明名称
GAS VALVE CLOSING DEVICE USING EXTERNAL PHONE
摘要
申请公布号
KR1019970000570(B1)
申请公布日期
1997.01.13
申请号
KR1019930021486
申请日期
1993.10.15
申请人
发明人
分类号
主分类号
代理机构
代理人
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