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经营范围
发明名称
A telescopically expanding replacement ladder rung
摘要
申请公布号
GB362382(A)
申请公布日期
1931.12.02
申请号
GB19300026146
申请日期
1930.09.02
申请人
WALTER WILLIAM WILLCOCKS
发明人
分类号
E06C7/08
主分类号
E06C7/08
代理机构
代理人
主权项
地址
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