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发明名称
Improvements in or relating to oil-scraper rings for pistons
摘要
申请公布号
GB574337(A)
申请公布日期
1946.01.01
申请号
GB19440000968
申请日期
1944.01.18
申请人
ROBERT WILLIAM HARVEY BALLEY
发明人
分类号
F16J9/20
主分类号
F16J9/20
代理机构
代理人
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