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发明名称
Draft member
摘要
申请公布号
US1786914(A)
申请公布日期
1930.12.30
申请号
US19250052062
申请日期
1925.08.24
申请人
THE SYMINGTON COMPANY
发明人
MARTIN MARK H.
分类号
B61G7/10
主分类号
B61G7/10
代理机构
代理人
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