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发明名称
Floating-lap ladder
摘要
申请公布号
US1758969(A)
申请公布日期
1930.05.20
申请号
US19280314659
申请日期
1928.10.24
申请人
PETER PIRSCH AND SONS CO.
发明人
PIRSCH PETER
分类号
E06C1/12
主分类号
E06C1/12
代理机构
代理人
主权项
地址
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