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发明名称
Expansible hollow core
摘要
申请公布号
US3296059(A)
申请公布日期
1967.01.03
申请号
US19630265935
申请日期
1963.03.18
申请人
SCHWINDT BENJAMIN W
发明人
SCHWINDT BENJAMIN W.
分类号
E04C2/36
主分类号
E04C2/36
代理机构
代理人
主权项
地址
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