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经营范围
发明名称
Piston packing ring
摘要
申请公布号
US2670255(A)
申请公布日期
1954.02.23
申请号
US19500169430
申请日期
1950.06.21
申请人
ALFRED BERGERON
发明人
BERGERON ALFRED
分类号
F16J9/16
主分类号
F16J9/16
代理机构
代理人
主权项
地址
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