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经营范围
发明名称
Engine valve
摘要
申请公布号
US2090800(A)
申请公布日期
1937.08.24
申请号
US19360091724
申请日期
1936.07.21
申请人
MACDONALD CHARLES M
发明人
MACDONALD CHARLES M.
分类号
F01L3/16
主分类号
F01L3/16
代理机构
代理人
主权项
地址
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