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发明名称
Scaffold raising and lowering device
摘要
申请公布号
US1751131(A)
申请公布日期
1930.03.18
申请号
US19270208726
申请日期
1927.07.27
申请人
COSTELLO JAMES F
发明人
COSTELLO JAMES F.
分类号
E04G3/32
主分类号
E04G3/32
代理机构
代理人
主权项
地址
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