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发明名称
Apparatus for manufacturing drain pipes in the earth
摘要
申请公布号
US2123243(A)
申请公布日期
1938.07.12
申请号
US19360092316
申请日期
1936.07.24
申请人
HEINZ JANERT
发明人
JANERT HEINZ
分类号
E02B11/02;E02F5/10
主分类号
E02B11/02
代理机构
代理人
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地址
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