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发明名称
Piston ring
摘要
申请公布号
US2364743(A)
申请公布日期
1944.12.12
申请号
US19430477240
申请日期
1943.02.26
申请人
KOPPERS COMPANY, INC.
发明人
MORTON ALLEN 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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