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发明名称
Piston ring
摘要
申请公布号
US2311557(A)
申请公布日期
1943.02.16
申请号
US19410422193
申请日期
1941.12.09
申请人
MASON WILLIAM S
发明人
MASON WILLIAM S.
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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