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发明名称
Draft gear
摘要
申请公布号
US1875704(A)
申请公布日期
1932.09.06
申请号
US19290372133
申请日期
1929.06.19
申请人
CHEATHAM FRANK S
发明人
CHEATHAM FRANK S.
分类号
B61G9/10
主分类号
B61G9/10
代理机构
代理人
主权项
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