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发明名称
Ladder assembly
摘要
申请公布号
US2398812(A)
申请公布日期
1946.04.23
申请号
US19450598191
申请日期
1945.06.07
申请人
STEIL WALLACE B
发明人
STEIL WALLACE B.
分类号
E06C1/26;E06C1/397
主分类号
E06C1/26
代理机构
代理人
主权项
地址
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