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发明名称
Improvements in or relating to building blocks
摘要
申请公布号
GB647813(A)
申请公布日期
1950.12.20
申请号
GB19480021231
申请日期
1948.08.11
申请人
CHARLES WILLIAM SNAZELL
发明人
分类号
E04D13/064
主分类号
E04D13/064
代理机构
代理人
主权项
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