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发明名称
Concrete pipe machine
摘要
申请公布号
US1838546(A)
申请公布日期
1931.12.29
申请号
US19280290463
申请日期
1928.07.05
申请人
AMERICAN CONCRETE PIPE COMPANY
发明人
HALSTEAD JOSEPH L.
分类号
B28B21/26;B28B21/94
主分类号
B28B21/26
代理机构
代理人
主权项
地址
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