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发明名称
Dispositif perfectionné de ballon d'obturation pour conduites de gaz
摘要
申请公布号
FR683782(A)
申请公布日期
1930.06.17
申请号
FRD683782
申请日期
1929.10.23
申请人
发明人
WILKINSON HURDMAN;DREW HERBERT BENJAMIN
分类号
F16L55/124
主分类号
F16L55/124
代理机构
代理人
主权项
地址
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