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发明名称
PISTON RINGS
摘要
申请公布号
US5068963(A)
申请公布日期
1991.12.03
申请号
US19900550208
申请日期
1990.07.10
申请人
T&N PLC
发明人
BRUCE, JOHN S.
分类号
B21D53/16;C21D7/02;C21D9/40;F16J9/12
主分类号
B21D53/16
代理机构
代理人
主权项
地址
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