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发明名称
Ladder
摘要
申请公布号
US1854240(A)
申请公布日期
1932.04.19
申请号
US19300469331
申请日期
1930.07.21
申请人
PAULINE STOCK
发明人
WITTEK HERMANN
分类号
E06C1/393
主分类号
E06C1/393
代理机构
代理人
主权项
地址
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