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经营范围
发明名称
Packing ring
摘要
申请公布号
US2294177(A)
申请公布日期
1942.08.25
申请号
US19410378447
申请日期
1941.02.11
申请人
D. NAPIER & SON LIMITED
发明人
HALFORD FRANK BERNARD
分类号
F16J9/20
主分类号
F16J9/20
代理机构
代理人
主权项
地址
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