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发明名称
Piston ring
摘要
申请公布号
US2235297(A)
申请公布日期
1941.03.18
申请号
US19390259942
申请日期
1939.03.06
申请人
MUSKEGON PISTON RING COMPANY
发明人
NORTON OLIVER G.;MCFALL THURLOW E.
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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