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发明名称
Extension ladder
摘要
申请公布号
US3019851(A)
申请公布日期
1962.02.06
申请号
US19600046837
申请日期
1960.08.01
申请人
DOSS ROGER C
发明人
DOSS ROGER C.
分类号
E06C1/38;E06C1/387;E06C7/46;E06C7/48
主分类号
E06C1/38
代理机构
代理人
主权项
地址
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