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发明名称
Prestressed concrete plank construction
摘要
申请公布号
US3283457(A)
申请公布日期
1966.11.08
申请号
US19640339506
申请日期
1964.01.22
申请人
BALTIMORE CONCRETE PLANK CORP.
发明人
HART WAYNE C.
分类号
B28B23/22
主分类号
B28B23/22
代理机构
代理人
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