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经营范围
发明名称
Improvements in or relating to piston rings
摘要
申请公布号
GB924016(A)
申请公布日期
1963.04.18
申请号
GB19600027860
申请日期
1960.08.11
申请人
HEPWORTH & GRANDAGE LIMITED
发明人
PERKINS WALTER
分类号
F16J9/26
主分类号
F16J9/26
代理机构
代理人
主权项
地址
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