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发明名称
Conveyer stairs
摘要
申请公布号
US1920457(A)
申请公布日期
1933.08.01
申请号
US19310520906
申请日期
1931.03.07
申请人
BARLING FRANK D
发明人
BARLING FRANK D.
分类号
B65G11/08
主分类号
B65G11/08
代理机构
代理人
主权项
地址
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