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发明名称
Mail-bag parachute
摘要
申请公布号
US1890083(A)
申请公布日期
1932.12.06
申请号
US19290413623
申请日期
1929.12.12
申请人
GRAEFF CHARLES M
发明人
GRAEFF CHARLES M.
分类号
B64D1/02
主分类号
B64D1/02
代理机构
代理人
主权项
地址
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