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经营范围
发明名称
INSTRUMENT FOR DETECTING PRESENCE OF GASES
摘要
申请公布号
PL150542(B1)
申请公布日期
1990.06.30
申请号
PL19850254538
申请日期
1985.07.12
申请人
发明人
分类号
E21F;E21F17/18;G01N;G01N1/24;(IPC1-7):G01N1/24
主分类号
E21F
代理机构
代理人
主权项
地址
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