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发明名称
Stopper for pipe lines
摘要
申请公布号
US1814677(A)
申请公布日期
1931.07.14
申请号
US19300449542
申请日期
1930.05.03
申请人
ALBERT FENNEMA
发明人
FENNEMA ALBERT
分类号
F16K7/10
主分类号
F16K7/10
代理机构
代理人
主权项
地址
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