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发明名称
Extension ladder
摘要
申请公布号
US2610875(A)
申请公布日期
1952.09.16
申请号
US19480017149
申请日期
1948.03.26
申请人
WHEELDEN HARRY L
发明人
WHEELDEN HARRY L.
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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