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发明名称
Apparatus and method for making prestressed concrete tubular members
摘要
申请公布号
US3046631(A)
申请公布日期
1962.07.31
申请号
US19570702035
申请日期
1957.12.11
申请人
LOCK JOINT PIPE COMPANY
发明人
OLIVIER DANIEL E.
分类号
B28B21/60
主分类号
B28B21/60
代理机构
代理人
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