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发明名称
Piston rings
摘要
申请公布号
US3373999(A)
申请公布日期
1968.03.19
申请号
US19650474782
申请日期
1965.07.26
申请人
AIR PRODUCTS AND CHEMICALS, INC.
发明人
JEPSEN ROBERT E.
分类号
F16J9/08
主分类号
F16J9/08
代理机构
代理人
主权项
地址
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