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发明名称
Piston ring construction
摘要
申请公布号
US2131970(A)
申请公布日期
1938.10.04
申请号
US19360067878
申请日期
1936.03.09
申请人
FAIRBANKS, MORSE & CO.
发明人
RITZ FREDERICK
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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