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发明名称
Ratchet ladder
摘要
申请公布号
US2800371(A)
申请公布日期
1957.07.23
申请号
US19540438525
申请日期
1954.06.22
申请人
QUERCETTI LOUIS C
发明人
QUERCETTI LOUIS C.
分类号
E06C1/38;E06C7/12;E06C7/16
主分类号
E06C1/38
代理机构
代理人
主权项
地址
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