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经营范围
发明名称
Piston ring
摘要
申请公布号
US2190204(A)
申请公布日期
1940.02.13
申请号
US19360106123
申请日期
1936.10.17
申请人
ALFRED BERGERON
发明人
BERGERON ALFRED
分类号
F16J9/14
主分类号
F16J9/14
代理机构
代理人
主权项
地址
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