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发明名称
Improvements in and relating to the manufacture of piston rings
摘要
申请公布号
GB692906(A)
申请公布日期
1953.06.17
申请号
GB19510021339
申请日期
1951.09.11
申请人
FRITZ ISLER
发明人
分类号
B23B5/26
主分类号
B23B5/26
代理机构
代理人
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