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发明名称
Apparatus for closing side openings into pipelines
摘要
申请公布号
US3155116(A)
申请公布日期
1964.11.03
申请号
US19620202640
申请日期
1962.06.04
申请人
T. D. WILLIAMSON, INC.
发明人
NOOY BURTON VER
分类号
F16J13/08;F16L55/136
主分类号
F16J13/08
代理机构
代理人
主权项
地址
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