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经营范围
发明名称
A SEAL FOR A PIPE
摘要
申请公布号
GB9323824(D0)
申请公布日期
1994.01.05
申请号
GB19930023824
申请日期
1993.11.18
申请人
BRITISH GAS PLC
发明人
分类号
F16L55/11;F16L55/179
主分类号
F16L55/11
代理机构
代理人
主权项
地址
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