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发明名称
Sand-anchoring device
摘要
申请公布号
US2643843(A)
申请公布日期
1953.06.30
申请号
US19480019549
申请日期
1948.04.07
申请人
DAVID BROWN
发明人
BROWN DAVID
分类号
E04H12/22
主分类号
E04H12/22
代理机构
代理人
主权项
地址
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