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发明名称
Extension ladder construction
摘要
申请公布号
US2153362(A)
申请公布日期
1939.04.04
申请号
US19360089793
申请日期
1936.07.09
申请人
THOMAS BONVILLE
发明人
BONVILLE THOMAS
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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