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发明名称
Ladder
摘要
申请公布号
US1946747(A)
申请公布日期
1934.02.13
申请号
US19320646037
申请日期
1932.12.07
申请人
RICHARD LABORDA
发明人
LABORDA RICHARD
分类号
E06C1/16
主分类号
E06C1/16
代理机构
代理人
主权项
地址
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