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发明名称
Pressure-balanced pipe-expansion joint
摘要
申请公布号
US2485370(A)
申请公布日期
1949.10.18
申请号
US19460679433
申请日期
1946.06.26
申请人
ALBERT DREYER
发明人
DREYER ALBERT
分类号
F16L51/03
主分类号
F16L51/03
代理机构
代理人
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地址
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