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经营范围
发明名称
Improvements in and relating to packing rings
摘要
申请公布号
GB668365(A)
申请公布日期
1952.03.19
申请号
GB19470028102
申请日期
1947.10.21
申请人
OTTO SIMMER
发明人
分类号
F16J15/32
主分类号
F16J15/32
代理机构
代理人
主权项
地址
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