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经营范围
发明名称
Improvements in or relating to securing together the adjacent ends of flexible sheets of black-board surfaced or like material
摘要
申请公布号
GB748192(A)
申请公布日期
1956.04.25
申请号
GB19530025152
申请日期
1953.09.11
申请人
GRAHAM FREDERICK CHARLES DIBBEN
发明人
分类号
B43L1/08
主分类号
B43L1/08
代理机构
代理人
主权项
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