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发明名称
Convertible stepladder
摘要
申请公布号
US2470053(A)
申请公布日期
1949.05.10
申请号
US19460682015
申请日期
1946.07.08
申请人
SALISBURY RAYMOND R
发明人
SALISBURY RAYMOND R.
分类号
E06C1/32;E06C7/14
主分类号
E06C1/32
代理机构
代理人
主权项
地址
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