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经营范围
发明名称
Piston ring
摘要
申请公布号
US1782426(A)
申请公布日期
1930.11.25
申请号
US19280302166
申请日期
1928.08.27
申请人
THE PISTON RING COMPANY
发明人
JOHNSON CHARLES E.
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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