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发明名称
Conically tapered dual seal ring pipe connection
摘要
申请公布号
US2768846(A)
申请公布日期
1956.10.30
申请号
US19530339709
申请日期
1953.03.02
申请人
LOUIS GRATZMULLER JEAN
发明人
GRATZMULLER JEAN LOUIS
分类号
F16L19/12
主分类号
F16L19/12
代理机构
代理人
主权项
地址
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