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发明名称
Steel piston ring
摘要
申请公布号
US2484288(A)
申请公布日期
1949.10.11
申请号
US19470793291
申请日期
1947.12.22
申请人
MUSKEGON PISTON RING COMPANY
发明人
HAMM DOUGLAS W.
分类号
F16J9/06;F16J9/20
主分类号
F16J9/06
代理机构
代理人
主权项
地址
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