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发明名称
Improvements relating to the manufacture of piston rings
摘要
申请公布号
GB721068(A)
申请公布日期
1954.12.29
申请号
GB19520027759
申请日期
1952.11.04
申请人
HEINRICH SPODIG;MAX KOEHLER
发明人
分类号
C22C33/02
主分类号
C22C33/02
代理机构
代理人
主权项
地址
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