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经营范围
发明名称
SEAL UNIT
摘要
申请公布号
GB8626057(D0)
申请公布日期
1986.12.03
申请号
GB19860026057
申请日期
1986.10.31
申请人
WEST & SON (ENGINEERS) LTD
发明人
分类号
E21C35/23;F16J15/34;F16J15/38;F16L27/087
主分类号
E21C35/23
代理机构
代理人
主权项
地址
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