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发明名称
Piston ring
摘要
申请公布号
US1999494(A)
申请公布日期
1935.04.30
申请号
US19330668713
申请日期
1933.05.01
申请人
ZAHODIAKIN VICTOR F
发明人
ZAHODIAKIN VICTOR F.
分类号
F16J9/20
主分类号
F16J9/20
代理机构
代理人
主权项
地址
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