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经营范围
发明名称
Valve spring
摘要
申请公布号
US2100057(A)
申请公布日期
1937.11.23
申请号
US19340712823
申请日期
1934.02.24
申请人
PACKARD MOTOR CAR COMPANY
发明人
KREBS HENRY
分类号
F01L1/46
主分类号
F01L1/46
代理机构
代理人
主权项
地址
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