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经营范围
发明名称
Piston ring
摘要
申请公布号
US2111291(A)
申请公布日期
1938.03.15
申请号
US19360112725
申请日期
1936.11.25
申请人
MASON WILLIAM S
发明人
MASON WILLIAM S.
分类号
F16J9/16
主分类号
F16J9/16
代理机构
代理人
主权项
地址
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